How to identify 18650 cell capacity by color / code and how to tell fakes from real – [En]

        Before anything, I’ll briefly explain what 18650 cells are and what uses they may have. I have worked a lot with 18650 cells and I used them for pretty much anything that needs power.
        Basically, they are Li-Ion cells, that means they have the same overall parameters as a now-days phone battery. Their nominal voltage is 3.7V or 3.6V, but this is not too relevant. What’s important to note is that they are fully charged at 4.2V and they are considered discharged at 3.3V. Overcharging or excessively discharging them will shorten their lifetime.
        The cells can be used for quite a lot of applications: flashlights, lasers, measurement tools, even power tools (but in this case some special ones are used that can provide higher current and have lower capacity – I will not discuss the tech details here). Practically, anything that used to be able to work with 3 AA/R6 or AAA/R3 batteries can be safely used with an 18650 cell. If the space conditions are met, it’s really good to have only one standard type of cell for anything. It’s very useful instead of having various sizes of rechargeable batteries.
        Now, to get to the point of the article: there are many dozens of types of 18650 cells that can be found in shops, on-line sites or laptop batteries. I will try to explain here how to find the correct capacity for the biggest 18650 cell manufacturers around. Note that ripping old laptop batteries is a good near-free way to acquire cells. Usually, you will find a dead pair, a good pair and 1-2 intermediary ones (assuming there are 3/4 pairs in the battery). Most of the time the cells that have 2V+ when ripped out can recover most of their capacity when charged, while the ones under 1V are no longer usable and will overheat if you try to charge them.
        There are 4 very big companies that produce (used to be) very good quality cells: Samsung, Sanyo, Sony and LG. And there’s also the 99.998% fakes called Ultrafire. Practically, all Ultrafire cells on the online market that state any capacity over 3000mAh are fakes. Since there are other fake cells with fake-stated capacity, I’ll tell you how to detect them too. Fist of all, they have stated capacities of over 4000mAh, which is not currently possible. The best confirmed capacity original cell at this point has 3400mAh. Second, their weight is lighter. Original cells are 45grams+. Fakes have mostly under 40g, and the worst quality ones are even 20g. Those have an effective capacity of under 500mAh, even if they state 4000mAh+ on the label.
        Now, for each of the 4 big companies I’ll tell you how to see what actual capacity a cell is. I’ll also post RGB values, since the pictures may not look 100% like the original.

        Most Samsung cells in circulation are kind of Cyan color (RGB: 80,255,255). Note that other smaller companies use this color, but only the Samsungs have Samsung written on them.
Here is the color I’m talking about – in this picture we have a 2000mAh cell. Same color can be found for 2200mAh (most common) and 2400mAh.
The 2000mAh ones can also be light blue (RGB: 40,200,255).
Light green (RGB: 15,240,115) is used by Samsung for 2200mAh and 2400mAh cells:
The majority of the 2200mAh cells are Cyan, like the pic with the 2000 ones. The green version is the newer 2200 model.
Most 2400 mAh cells are DarkSkyblue (RGB: 0,120,240):
The 2600 mAh cells from Samsung come in only one color so far – Ugly Pink (RGB: 255,128,255):
Note that it’s more pink/ugly when seen live.
Samsung also has 3000mAh cells on the market, which are not that ugly as the pink ones (RGB: 100,133,200):
Since for 2000,2200 and 2400 mAh cell things can get confusing when it comes to colors, the best way to identify capacity is from the end of the line number in the first text line on the cell (the row where it says 18650). As you can see in the pictures, that’s exactly what 20,22,24,26 and 30 mean – it’s the capacity tag for any Samsung cells. So there you have it, you can now identify any Samsung cell.

Most Sanyo cells are RED (RGB: 255,0,0), or the new fakeRED (RGB: 255,0,64) that’s infested with blue (we’ll talk about that later). They are the most hard to identify overall.

This is how a real red cell suppose to look like (RGB: 255,0,0):
The 2000mAh original ones are indeed red by any standards. The cap is white. So if it’s pure red ones it’s 2000mAh capacity. The newer ones were also fakered (RGB: 255,0,64), but the cap is still white.
Here they are:

The 2200mAh cells and above are fakered (RGB: 255,0,64). It’s hard to detect in a picture, but there’s a clear tendency towards purple for those.
You can tell the cells that have 2200mAh capacity be the RED cap. Yes, the cap is true red, unlike the rest of the cell.
The 2600mAh ones are also fakered (RGB: 255,0,64), but those have cyan cap. Don’t get tricked by the red in the picture, it’s a lot more towards purple in practice:

The new 2800 and 3100 capacity models are orange and purple, but I haven’t seen any yet, so I won’t post them yet.

The high power cells (like the high current 1500mAh ones used in power tools) have a pink or light blue cap.
So, to identify the Sanyo cell, you’ll have to use actual color nuance and cap color, since the series written on them are most of the time barely visible.
Still, I’ll list the known series so you know what’s what if you can actually read it from the cell:

UR18650EA 2350mAh High Drain
UR18650RX 2050mAh High Drain
UR18650W2 1600mAh High Drain
UR18650WX 1600mAh High Drain
UR18650A 2250mAh Standard
UR18650AA 2250mAh Standard
UR18650ZY 2600mAh Standard
UR18650ZT 2700mAh High Capacity
UR18650ZTA 3000mAh High Capacity

They are part of the above, so I did not consider them a separate company.
Panasonic has 3 common cells in circulation.

The lime-green (RGB: 200,255,127) has 2250mAh:

There is a 2900mAh cell that is ugly grey (RGB: 163,163,163) :

Their newer blue-infested green (RGB: 0,255,127 ) cell has 3100mAh:

Sony are standard green (RGB: 0,183,0). All of them are the same green so we’ll have to identify them differently. The way to identify them is the G-number.
On the second line, the first number after the G is the capacity identifier.
Here’s the 2200mAh cell:
Here we have the 2400mAh cell:
And finally the 2600mAh one:

As you can see, the 2000mAh cell is marked with G5, the 2400 one with G7 and the 2600 one with G8.
That’s how to tell them apart. There’s also another important difference for the 2600mAh cell: it’s case does not cover the bottom at all, unlike the 2200 and 2400 ones there it’s bent and covers about 1mm of the bottom part. I think 2400mAh cells do exist that have no bottom cover also, but are in significantly smaller number.

Last one in the big league is LG. In their case, the series on the cells are a big mess and will never make sense unless you search for them and even then you may not find anything relevant. But the good thing is that they can be identified very easy by color.
The 2000mAh cells are pale orange (RGB: 255,155,112); they can still be found around:

The 2200mAh are grey (RGB: 172,172,183). They are still one of the most common LG cells:

Probably the most used LG cell today is the 2600mAh one which is orange (RGB: 255,155,63):

LG also has some new cells rated at 3100mAh (RGB 147,147,255):
No, they’re not as ugly as the Samsung pink but not very pleasant to look at either.

As you see, the good way to identify LG cells is directly by color.

        So there you have it – each one has a trick: for Samsung you have to check the tag at the end of the line, for Sanyo the cap for Sony the G-spot and for LG just the cell color.

        If you have any unidentified cell, don’t hesitate to post a link with a picture of it and I’m sure we can find what’s with it.

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416 Responses to How to identify 18650 cell capacity by color / code and how to tell fakes from real – [En]

  1. Dan Foresman says:

    I want to thank you for this, it helps me choose the 18650 for many projects, and to build battery packs, one needs spot welding and hobby chargers. A bit of a leap, although the Chevy Volt used packs do tempt me still for the Ebikes…
    So, I have to buy accessories to go this way, and the counterfeiting has really concerned me, you have done an amazing thing to help people with this article. I’ll be back!

    • xaeus says:

      Thanks for the feedback. Make sure to check my article about safely soldering cells here: .

      • James Butts says:

        So I just took some cells from a damaged speaker and wanna know there capacity and outputs and what not about them theyre from a damaged JBL Charge 4 and I compared them to my others and ik theyre 18650s atleast and would like to use them for my vapes but Idk how safe this is so hoping to get some help contact me at please thanks.

      • xaeus says:

        You should post a pic of them here. Usually, speakers don’t use/need high power cells so probably they are not good for vaping.

      • Willy says:

        I just came across the page doing a search and I’m amazed of how complicated battery’s can get. Simple question please, what would be a good affordable 18650 battery to use in a Flashlight? The battery that came with the light is a Royal Blue Color 18650 3.7V but no mAh

      • xaeus says:

        The unmarked blues are most likely ultrafire-like fakes with very few mAh. Since it’s a flashlight you don’t need high current cells so you can go for max capacity like 3000-3500mAh, like a Samsung 35E or a Panasonic.

  2. Wasim iqbal says:

    very informative thx

  3. jhonn says:

    i need help to identify those batteries ….

  4. Eric says:

    Great article. You know your 18650’s.

  5. KAROL Struck says:

    Thanks for the info I was lost unfortunately there’s a lot of counterfeit out there and they just found out I have purchased counterfeit ones they were yellow and listed at 9900 milliamps hours I still can’t believe how much energy actually gets packed into the little batteries the projects I have in mind now for these little guys any word from making the battery for my friend scooter which always has a hard time starting I think these will do the trick even if they are counterfeit thank you again for all your help Yours Truly Carl

    • xaeus says:

      You may have been in luck and had some refurbished ones that would give 1600-2000mAh. Last yellow 9800 I measured did give 2000mAh which is excellent for a fake. Weight it, if it’s 43 grams+ should be a refurbished and have at least 1600mAh. If it’s lower than 40grams it’s certainly below 1000mAh.

  6. Martin Morris says:

    Can you please tell me what my cells are they are a yellow and i think there chinese in my 60 volt 20 ah e bike battery .thanks.

  7. PrashMotion says:

    I have found those four 18650’s in a power bank I bought. It died a couple of days later for some reason. The cells are healthy and have a capacity of 2.5Ah. But I can’t find out which brand they are. Here’s a link to a picture of them: The powerbank btw cost about 25 bucks. And there are total 4 cells.

    • xaeus says:

      Those are cell made by a NOVA division of Shenzhen Nova Technology Co., Ltd,a company from Guangdong, China which makes some pretty nice car LED light systems. The cells suppose to be the equivalent of the LG 2500 HE2. They are designed for medium power use/ ‘vaping’ purposes.
      I have not made capacity tests on those models, but manufacturer states that discharge rate for them is 25A which is better compared to the original 20A HE2 LGs.
      Judging by the weight, they are original and should have near or the stated capacity. Probably your power-bank has electronics that failed.

  8. Michael Gray says:

    Can you help me identify these?


    • xaeus says:

      If you’re referring to the blue ones in the middle, they are original 2200mAh manufactured by Chang Jiang BATTERY Co. Ltd. (Yangtze River), China, which is a very large manufacturer. They are comparable to the Samsung 2200mAh.

  9. Bob says:

    I need some help on mine INR18650PL 17c10 4.68w do you know the specs on these?

    • xaeus says:

      Those are high current 1300mAh cells. The original ones should be light blue. They are the equivalent of the Samsung INR 18650 13P.
      4.68Wh means relatively 1300mAh @ 3.6 – 3.7 V.
      P.S. What’s marked INR is a high current cell. IMRs are medium current and ICRs are low current high capacity (like notebook cells).

  10. Bob says:

    Yes they are light blue

  11. Bob says:

    Any way I can test the battery with out un soldering it. I have them out But they are machine soldered

  12. Bob says:

    Any possible way that it could be 4000mah 72wh

  13. Bob says:

    How about this is this 4000mah INR 18650hp-c16e 3.7v I can not seem to find them on the web

  14. Bob says:

    oops correction oh they don’t say INR they just say: li-ion 18650hp-c16e 3.7v but they are for power tools

  15. EK says:


    These cells came from a high quality industrial product so they should be good quality but I cannot find anything online. Under the sleeve there is an etched code that says: CG – DG03D
    Thanks for any information you have. If the above image doesnt work, here is a link:

  16. Tim says:

    OP you are awesome, I have gained a good idea by only reading your article already. And to check my aftermarket Makita battery pack, I opened the case and the cell is light green with code ISR18650-A 17E, do you have any idea of the manufacturer and the cell capacity and performance?
    Many thanks.

    • xaeus says:

      HSB China, 1700mAh medium power. You can replace it with sanyos and sonys V3 of 2100-2150mAh (standard green color: ).

      • Tim says:

        Thank you so much xaeus. I am really amazed by how well you know the batteries 🙂 . Even google returns nothing relevant when I search the code.

  17. Bob says:

    INR18650PL 17c10 4.68wh I think these are fake also sold as 4000mAh but I think they are only 1300mAh Watch out for these

  18. Bob R says:

    Hello everyone, Is there such thing as a 12000 mAh 18650? if so, is this a good brand?
    Many thanks,
    Bob Rosedale, MD. USA

    • xaeus says:

      No, no such thing exists. The most high capacity cell up to date is 3700mAh. That thing probably is under 400mAh or so. Don’t buy such fake junk.

  19. d_t_a says:

    I would like to ask if 18650 #5, #9 and #10 on the image below can be identified?
    (#5 is marked “ICR18650NQ” but I can’t verify if it’s a genuine Samsung; #9 has no markings at all; #10 is a 2000mAh 18650 that’s only labeled with a local battery shop’s name)

  20. xaeus says:

    ICR-18650 NQ-SP could be 2600 mAh Emmirech’s, in theory equivalent of the 2600maH pink Samsungs. Since it does not say NQ-SP it’s probably faked. 9 and 10 are rebrands/refurbishes – it could be anything in them.

    • miguelito says:

      Hi, I’m a little puzzled by some cells that I just purchased and wanted to ask for your opinion. I bought 4 of them through AliExpress, advertised as Panasonic NCR18650B cells, for ~17USD. I knew there was a chance that they are not Panasonics, but my wager was that it’s still a good deal for something that might come close.

      They definitely are not originals, as the wrap is a little off and lacks the QR-Code as well as the second Datestamp on the underwrapper. The positive terminal is also not the Panasonic 3 legged one, but rather a 5 legged one, just like nrs. 5 and 10 in d_t_a ‘s picture. Size and weight are similiar to real Panasonics though.

      Now what baffles me is that the cells seems to perform just like the real deal. I have a Lii-500 charger, and it says their internal resistance is between 23 and 38 mΩ, while they all take charges of 3200 to 3300 mAh.

      I have some real NCR18650B’s (ca 80 charge cycles old), and they measure in at 30 to 45 mΩ and 3200 to 3300 mAh.

      Is it possible that chinese manufacturers produce cells of this quality in 2019, or is there another explanation?

      • xaeus says:

        If you measured only the capacity that went into the cell when charging that is not relevant as a lot more energy can be used and waster and only part of it stored in the cell. If you measured by fully charging the cell and then discharging completely to get the result, then the measurement is accurate. If the measurement was correct, it’s very likely that you ended up with a pretty good cell, even if it’s not an original Panasonic. So yes, it is possible. I did encounter some no-names that did held up to their stated capacity. Of course, not ultrafire-like fakes, but cells that actually sated correct capacity. As for the 5-head, Nitecore used the 5 type, but then what would be the logic of rebranding a nitecore to Panasonic ? Maybe there are some nitecore cells that did not passes QC for current and they re-labeled them for normal current use. If so, you’re in luck, you actually got cells better than the original Panasonics. Something not working at stated 35A current but a little lower is certainly a win vs a 3A cell.

  21. Do you know what these are? From green works 40v battery pack.

  22. xaeus says:

    It’s a good cell, most lots are very reliable. It’s normal current (2A), not medium or high. I use these and Samsungs 2600mAh pinks for laptop cell replacement. They proved more lasting than the Samsungs.

  23. OLUSOLA MAXRAY says:

    Xaeus ,Your insight,response,knowledge, is fantastic..!!. Thank you I have learnt enough here.

    • Jim Silva says:

      Thanks for the info. Did some review and although the weight ratio looked ok for 2500mAh, there were some bad reviews of the cells.
      Heavier ones from DHGate

  24. Jerry says:

    Hi Xaeus, can you identify the cells in this picture? They’re part of a 52 volt 60 Ah ebike battery. Can you recommend a suitable replacement with a higher capacity? Thank you

    • xaeus says:

      The INR marking means they are (or suppose to be) high current. 14Wh means an equivalent of 3700mAh, which seems too much for INR. So the markings are kind of inconsistent.

      How many were in the pack? Judging from that, we can determine the capacity per cell. 52V would imply 14 cells in series, but were there more pairs ? 60Ah sound weird, would imply 20 or 30 pairs, so I doubt that’s correct…that would be the size of a car battery.

    • john says:

      it dousnot say 14w
      it says 8.14w

  25. Michael says:

    Hey Xaeus! I am looking to replace 4 cells in a bike headlight battery pack they are Samsung labeled ICR18650-26C Clearly they are 2600mAh cells but, that C concerns me. It doesn’t look like the ICR18650-26C cells are available any more. I do see that Samsung ICR18650-26F cells are readily available and appear to have identical specs. Do you know what the C & F designations indicate? Very helpful post! Thanks.

    • xaeus says:

      They are identical is specs but differ in internal chemistry.

      For example, As and Cs use the standard classic ICR Lithium cobalt oxide (LiCoO2) while Fs use a newer Mixed Co/Ni/Mn like (but not identical to) INR’s LiNiMnCoO2.

      Practically, in your case, it’s less likely that they heat-up. Overheating too fast when drained is the reason they gave up manufacturing Cs in favor of Fs.

  26. Dave says:

    Can anybody recognize these 18650

  27. Dave says:

    Can anybody recognize these,Awaiting delivery of these(10,000) and was just hoping someone might have an insight

    • xaeus says:

      They look like Sony, but you’ll have to post a pic with what’s written on one of them to identify an exact model.

    • John Robertson says:

      Hi Dave, did you recieve your10K 18650’s?, are you interested oin reselling some?, let me know the specs. Thanks John

  28. Hi all, can you please identify a 18650 cell for me? The Code on the metal is JSE9 49M51 VCC1 VCC1. There is no wrap on it.
    Thank you very much from Germany.

  29. ALEX says:

    Hi, do you know if the 2600mAh Samsung are still making? or they stopped the production?
    Do you know what is the expensive comparing the same 2600mAh,Samsung or LG?

    • xaeus says:

      Yes, they still make 2600mAh, the current model is 18650-26F. Prices between LG and Samsungs of same capacity is nearly the same, it’s the discounts you can get that make the actual difference.

      • ALEX says:

        Thank you very much Xaeus!! 🙂
        Do you know more website to learn more about battery cell? and get the real price for a single cell?

    • xaeus says:

      Pricing varies a lot, but original cells are not sold at junk price. Original cells usually start at $10 upwards.

  30. deep says:

    Could you suggest me which battery is preferable to replace Sanyo UR18650A means same characteristic with Sanyo UR18650A as Sanyo UR18650A is not available in our area and it will be used with other 5 Sanyo UR18650A battery in laptop battery.

    • xaeus says:

      Please check the second line starting with ‘G’. Usually, those are 2200 to 2600 mAh, so a Samsung ICR18650-26F should do well as replacement for any of them.

  31. rob says:

    Is this a knock off 18650? Its in a flashlight and not sure how to find it

  32. Can you tell me anything about the following.

    I just received a new laptop battery that I took apart. The 9 cells have the following written on them “+ FP 18650 1800mAh 170918”. The cells have green packaging. I thought I was receiving 9 2600mAh cells based on what the laptop battery packaging indicates.

    I’m not able to share a picture of my setup, there’s no option for photos or files in the comments.

    • xaeus says:

      FP are made by Shenzhen Vodno Technology Co., Ltd. They are considered of good quality. What was on the laptop packaging (Voltage, Wh) ? It’s strange because those are made for vaping (sub-ohm category).

      • It said, “Model 1526 Rating: 11.1v 7800mAh/87wh” on the outside of the laptop battery. There’s more written on the side of the bms, “1526 11.1v6.6AH, 17.9.12 366000”..which is completely different than the laptop and the cells. The listing on ebay said it was 9 cells, so I thought it would be 2600mAh per cell but it was 9 cells at 1800mAh which was an unexpected disappointment.

        I would like to build a battery bank (~ 2 kW) out of these cells but not if they aren’t going to last for a significant amount of time and not if I can’t get them at the right price. I don’t really know the positives and negatives of the higher and lower capacities. Do they have a decent number of cycles? Do you have any advice for this type of setup? I’m obviously working in unfamiliar territory.

        What does sub-ohm category mean?

      • xaeus says:

        Maximum continuous current should be 10A, since it’s a vaping cell, assuming it’s original and full capacity. As for the cycles, only time will tell. Sub-ohm means it’s a high current cell that can have a consumer that has an internal resistance of under 1 ohm, which many vaping devices have. Such a small resistance value would cause a normal classic cell to overheat and even set on fire.
        As for the bank, it really depends on what you want to use it for. What voltage do you need and what is the constant consumption/discharge (wh) ?

      • Do you know how I would find the maximum continuous current for these cells?

  33. OLIVIER KELLER says:

    Hello could you help me to identify a battery I have in a rechargeable lamp? on the barcode is written: INR18650HH DL-14L09 . color is light blue.
    thanks much!

    • xaeus says:

      It’s a high current model of 1400mAh similar to INR18650PL-1300. You can replace it with a Samsung INR18650-13Q or 15Q or the sanyo 1500mAh equivalent.

      • OLIVIER KELLER says:

        Hello again
        I cannot find the INR18650-13Q or 15Q or sanyo 1500mAh , but I found:
        INR18650 30Q (litokala or varicore)
        sanyo 18650 ur18650w2 (masterfire)
        samsung INR18650 25R
        samsung INR18650 26F
        INR18650 30B
        INR18650 30Q

        that would help greatly!

    • xaeus says:

      You could use INR18650 30Q, they will give you double the capacity and a little less current.

  34. OLIVIER KELLER says:

    thanks much!

  35. Moses says:

    Hi,I have harvested some batteries from laptop battery pack, never found any thing like your site,I will go home and check each and individual battery and will try to name it if not will post the pics and request you.
    Hats off to you for the knowledge you possess and the way patiently handling all queries.

  36. I kinda just read your stuff and I was wanting to make a charger for my extracted sets, so I wanted to know how much is the capacities of the batteries I have.

    It’s part of a power bank my neice have left me, and some of these my friend gave randomly. They all look very similar with a pink (ugly?) colored “skin”, but I have two sets (ie, two printed patterns). They all state 18650 so I kinda assume they are similar on that matter as well, but what I can’t get is the mAh of these. I need it so I can build a proper charger. Also, does it indice how many cells they contain inside? I’ve been coming across terms like 1s, 2s, and 3s but I’m not sure if it means the cells INSIDE each battery or the cell is THE individual battery.

    Not sure how to post a pic in this site (first timer here) but here’s a link to it:

    BTW, nice job on having this page. Great help to a lot of people especially those who like to get hands-on on things.

    • xaeus says:

      Hello. You don’t need to know how many mAh they have in order to build a charger. However, they look like Samsung 2600mAh from the pic you posted.

  37. Viktor says:

    Hi! I am really wondering how the battery codes can be interpreted. E.g. I am looking for a replacement of Samsung 18650-13P, I have realized what 13 means – 1300 mAh, however P is a mistery. I have seen that Q should be ok for replacement, but is it for real? Also 25Q is ok if I want to have higher capacity?
    I could use a manufacturer code translator.. do you happen to have such info?

    • xaeus says:

      Those are actually used to difference between tech-ups, so they are fully compatible with each other. In your case, P, Q and L are fully compatible.

  38. Sebastian says:

    Inside a 6000mah Makita aftermarket battery there are green cells with ISR18650-A 17h printed on them, 3×5 config. I suppose they are 1700mah giving a total of 5100mah. But are they high-drain or not? Bought from Ali so I guess I am not surprised if not as advertised

  39. xaeus says:

    Those are CEBAs. Yes, they are high drain. You can safely replace them with samsungs 1500mAh (15Q).

  40. sebastian says:

    Thanks for your help. They are 1700mah right? So 3*1700mah total?

  41. Sebastian says:

    How about this one then, inside yet another Ali aftermarket Makita 18V li-on battery with stated 6000mah using a 2*5 configuration implying cells of 3000mah capacity.

  42. MLopes says:

    hello xaeus,
    thank you very much for a great post. very informative.
    i’m thinking about buying this caving light (duo version):
    because i’ll use it for caving but also for cavediving i need very reliable cells but also need them to give me as many hours of light as possible.
    i’m looking for no less than the state of the art 18650 cell for this purpose. which one would you recommend? any brand, maker or model is ok since i have none.
    (i was looking to panasonic but they have so many “models”, “b”, “bd”, “be”, “a”, “f”, etc, that i got completely lost).
    thank you! 🙂

    • xaeus says:

      For LED lamp use, most clients were very satisfied with the 2200,2400 and 2600mAh green Sony cells. Even after years they still maintained capacity well. For very high capacity Panasonic would be a good way to go. The ratings are iterations of the manufacturing tech-ups. NCR18650A was the initial type of base cell,then it was followed by NCR18650B, which is the same tech used in Tesla Car batteries. Two widely-available variations of the NCR18650B are the NCR18650BD (grey) and NCR18650BE (light green). The BE has a little higher capacity and a way faster charge time (5:8 compared to the BD) so this would be the proper choice. I had no opportunity to mass-test Sony cells higher than 2600mAh (normal drain, high capacity). The high drain models (V1s, V3s, VTC6) proved to act a little strange from a lifetime perspective (some experienced sudden death while others were long-lasting). So I’d stick with Panasonic 3200mAh BE or the older 3400mAh B.

      • Miguel Lopes says:

        thank you very much for your reply and explanations.
        a friend also suggested me the LG 18650 MJ1 3500mAh (green). do you have any experience with those? what do you think about them?
        do you know where to buy panasonic or lg or whatever genuine cells in europe? a secure place that does’nt sell fakes

      • xaeus says:

        I intensively tested LGs of 2000,2200,2400,260, 2800 and 3100 mAh. Overall, I was less satisfied with their durability compared to Sony or Sanyo. That doesn’t mean you can’t get a good lot. As for getting originals, mostly the shops that sell many types of batteries (are specialized on this) don’t afford to cheat on their customers. the highest chance to get originals is if you rip them off power tool batteries or original laptop batteries.

  43. Fangface69 says:

    I need help identifying this battery. It has a gray wrap with
    +ROOFER 2600mAh 9.62WH HIP
    printed on it. Would like to know who made it and its stats besides the mAh like what kind if amps it’s rated for and uf its high drain or not.

    • xaeus says:

      A picture of it could help. Roofers are manufactured by Shenzhen Co. Ltd. , China and are quite similar to the LG equivalent of the same capacity rating. INR means it’s a high drain.

      • Fangface69 says:

        Thanks! Sorry I had no idea how to get a pic posted on here. But you’re info helps alot.

  44. Sebastian says:

    Hello again.
    Just received an aftermarket Hitachi 18v battery from Ali.
    It is stated to be a 5Ah 90Wh battery, although the label also states EBM1830 which I guess is a Hitachi model no for 3Ah. As it is from China, who knows what capacity cells are actually inside. So I opened it.
    The cells are blue, marked with manufacturing date, preceeded with a string of something that ends with 000D.

    Brand and capacity possible to predict based on this information?

  45. Michael Gray says:

    Hey all, this is a fantastic thread! If I may, I’d like to share a database of 18650 cells: It’s fairly extensive but far from complete. Anyone who has time or interest is welcome to share their info with the group. (You probably have to register first though.) And all are welcome to see the info that we do have. No registration should be needed for just viewing the database. 🙂

    • xaeus says:

      Hail. I’ve seen it a while ago. Good job centralizing that ! When checking a few months back, I have discovered some cells not in there, I’d be happy to share them with you. I’ll just have to find some time to compare with my own DB (maybe take some pictures). I’ll e-mail you (or register and post if needed) the colors and cap colors. I think color naming should be a little more detailed (’cause there are many types or red, green, blue and gray-based cells). It would be nice to keep that updated.

      • Michael Gray says:

        I’d be happy to share your info if you’d rather email me than register. I’ll make sure you get the credit. Speaking of which, I’ve only sent in a few photos to the database. The real work has mostly been done by the other Mike, who actually administrates the website. 🙂

    • xaeus says:

      It could really be useful to have the mAh ratings in the main table. Much easier to follow and update.

      • Michael Gray says:

        I’m not sure why, but the admins discussed that a while back, and decided not to put capacity on the main page. There is a filter for minimum mAh though. A lot of the cells listed are missing datasheets, so the rated capacity is not known. That might be a factor.

    • xaeus says:

      I’ve send you some by e-mail.

  46. mohamed alaa says:

    really thank you very much, really you are a great person

  47. Rahul says:

    I was wondering if there are any stability, safety and performance issues inside a cell when the capacity is higher? For instance, it is said that 3Ah (84 grams) is the ideal capacity for a LiFePO4 26650 cell, but some companies are manufacturing 3.2Ah (85 grams) and 3.4Ah (86 grams) cell in the same 26650 size and the weight. Their datasheet shows the same discharge and charge values. Is it a good idea to use for high rated cells in this case? The application here is mainly Solar Energy Storage and EVs. Also this question is with reference to the fact that no new invention has been done increase the gravimetric and volumetric density in the LiFePO4 chemistry since the industry is now working to transition to NMC.

    • xaeus says:

      Hello. There can be a difference in the technology itself. You can make different capacities at the same weight; as technology evolves, optimizations can increase capacity. But…companies can also cheat on this. While a classic Li-Ion cell was considered depleted at 3.3V, now-days companies state that their depletion voltage is 3.0 or other less than 3.3V values, therefore artificially inflating the value of the actual capacity. For example, A 3100 mAh considered depleted at 3.3V can be declared as a 3400mAh battery if the depletion value is stated to be 3.0 V. Neutrally speaking, this is cheating. The battery will fail to provide a good current in this situation when at low voltage. So you have capacity left, but it’s useless. This ‘cheat’ may work for general use, but will not work for batteries used by tools that mostly draw current near the maximum supported by the battery. In your case, solar energy storage is not a high-current use situation unless it was badly designed (on the drain/consumption side), so it would be safe to use anything, but you may find out that in some cases that the practical time the batteries last will be actually identical for various close capacity values.

  48. Rozi says:

    Hi! First thank you for your post it’s verry helpfull.
    I just took apart an old laptop battery and find 6 cells inside. All seems to be working well, voltage is good and everything. Is it posible to identify them? I see they are LG ‘s but are th3y those LG’ s 3100mAh – ugly pink?–FVEjvdyce1c/view?usp=drivesdk

    Thank you in advance!

    • xaeus says:

      I requested access to g-drive to see your link. For making things easier, everyone should use free image hosting sites, those don’t need additional approval steps.

      • Rozi says:

        Sorry, didn’t know how else to post picture 🙂
        Hope you got the approval. Will try to change hosting site.

    • xaeus says:

      Pic worked. No, those don’t look like the 3100mAh ones. From what notebook was the battery ? They may be a more rare version of 2000-2200mAh.

      • Rozi says:

        HP Probook 4710S was the laptop.
        I charged them and they seem to be working in my flashlight. Testing right now how long they will last in it. 🙂
        Thank you!

      • Rozi says:

        Oh, sorry. HP Compay 7400 was the laptop model.

    • xaeus says:

      Yeap, I was right, those had 4000mAh batteries which means that the cells are 2000mAh, which is actually luck because the 2000mAh cells are among the most long-lasting cells ever made.

      • Rozi says:

        Yaay, good news for me then 🙂
        Thank you very much for your help!

  49. Nikola says:

    HI, need help for batteris ISR18650-C 17H what is capacity of them.

    • xaeus says:

      Where do you have them from ? Do post a picture if you can. Those appear to be made by HSB China, 1700mAh medium power. H-series are newer that E an F models.

  50. Nikola says:

    From Amazon UK as replacment battery for tool,
    here is link for cell:

  51. Nikola says:

    was 5AH

  52. BBBB says:

    This is the most helpful 18650 link.Thank you ,keep up the GREAT work

  53. Mario friend says:

    Help with identifying. orange fast 18650-3000mah vol3.75v-4.35v. I wan trying to mostly identify the amp for the batteries to safely use them

    • xaeus says:

      A picture would help, but if they are rated up to 4.35, most likely they are normal current so that means it’s not recommended to exceed a 1A continuous discharge. Simply said, don’t exceed 5 Watts per cell consumption.

  54. David Weiss says:

    I recently purchased a battery pack for my ebike and I can’t figure out what cells were used. I was told that they were panasonic, but I don’t think so. I need help identifying them. They are pink with a long bar code. The numbers on them are SINC ISR 18650 25A18109022562

  55. Aswin G Sharif says:

    Much appreciate for clear explanation!
    It help to be cautious when buying used 18650 (less than USD1 each, just for mini electronic projects, not for electric bike tough).
    there are so many sellers who claim their cells are above 2000 or 3000 mAh, so now I can validate their claims…..

    • xaeus says:

      A cell above 2000mAh true capacity cannot cost under $1, that should be clear for anyone. There are cells at even 1/3$ in my country but they are of 400mAh even if over 3k is written on the label. For bike projects you can use standard cells in the range of 2000-3100mAh (they can be obtained from recycled laptop batteries).

  56. Darren says:

    Can you ID these guys? The blue one is from an unknown source. The copper/orange battery is one of two from a 2200 mAh powerbank. Cost for powerbank is $2.50 from Frye’s. Wondering if it’s 1100 or 2200 each. If 2200 each, then $1.25 per battery is a pretty good investment. However, the batteries are shipped/stored at 0v. I charged both up to 4.2v, but not sure how long they’ll hold the charge.

  57. xaeus says:

    Both seem to be generic re-packed cells. You most like will have to measure capacity to see how good they are. If the powerbank had 2200mAh rating and 2 cells, it means the cells are 1100mAh which is mostly the average area where both the blue cells and most of the ones marked with YN- are situated.

  58. Kakaroto Fracassado says:

    Hi, xaeus. I cant identify the brand of these cells since they have nothing written in them. The package says ¨Samsung¨. Can you please take a look?

    Btw, if you know anything about the circuit (BMS/PCB) under the cells that also would help me.

  59. vikas kumar says:

    can we repair laptop battery by using 18650 rechargeable taken from power banks?
    bcz 13000 mah power bank costs 1200 rupees (5 lg made18650 battery) and if i will purchase separate battery from market then it will cost much more.

    my concern is that is there any difference between batteries used in laptop and power banks.
    bcz original laptop battery will cost almost triple the cost of power bank. and the capacity will also increase by using the battery taken from power bank.

    • xaeus says:

      It depends on the quality of the cells in the power bank. Cheap power banks may have junk cells. A true 13000mAh power bank should have 5x2600mAh cells. If it actually does, then certainly with these 5 cells you can replace 4 cells from any known laptop. If the cells are repacks/fakes, you’ll get way less capacity and they may not even work in a laptop (like ultrafires).

      • vikas kumar says:

        first off all thank you for the reply.
        actually i have purchased a power bank…ambrane… that uses 5 lg made batteries(2600 mah each) so can i use these 5 cells to repair my laptop battery?
        i am asking bcz every power bank manufacturer tells that it will last 500 to 700 charge discharge cycle but an original laptop battery last way more than these average 600 charge discharge cycle(average 2 to 3 years.).
        bcz if i will charge my laptop 3 to 4 times a day then it will last hardly 5 to 6 month.
        so what should i choose?
        1..i should repair the battery by using power bank battery by investing 1000 rupees. or
        2.. i should invest 3 to 4 thousand on buying the original laptop battery.

        and no one knows that the so called original battery will last or not like the battery that came with the laptop(hp elitebook 8470p) .

    • xaeus says:

      If the pack has high quality cells there’s no reason not to used them for the battery repair. Put those new cell into the laptop battery and the old laptop cell you can check how many of them are still good (usually a part) and use those for the power pack and still have a usable power pack, even if of lower capacity. Can you write the model of the laptop you want the battery upgraded ?

      • vikas kumar says:

        Thank you again for the reply
        The laptop model is HP Elitebook 8470p

    • xaeus says:

      From what I recall those models can have 9 6 or 3 cells, so for a 9-cell main battery or 6-cell you’ll need 2 packs to completely replace the cells (unless you got the light version with 3 cells). They also support connecting and external secondary battery.

  60. David says:

    Hi Mate, can you help me identify these LG Cells:
    Color turquise, Ring: white, written: LGDB118650 H3222904047 EK172D8B1
    Have 4 of them, propably they come from an laptop accu.

    Thank You!

    • xaeus says:

      Hello. If it’s the cyan-colored one, it’s 2600mAh. They support a little higher current drain than average (up to 5A compared to up to 2 for most others).

    • xaeus says:

      Depends on the power consumption of the device you want to use them in. If it does not exceed 15W per the 4 cells you should be fine.

  61. David says:

    Yes they are cyan colored, thank you. Can I charge them with 1C?


    i NEED FOR lectric bike a battery pack with samsung type batttery 18650 to give 36 volt , 10,4 amph and 300 watt. How made the pack and how many cells need.

    • xaeus says:

      36 volts requires 10 cells in series (and you will need to charge them to 42V for a full charge, meaning you need a charger that provided more that 42V). Considering you need 300W, and that a samsung cell has 14 to 20 W usually, you can obtain your power requirement with 2 or 3 pairs. But that will give you a relatively low capacity for electric bikes. It’s best that you use 5 pairs of 10 cells in series (that’s 50 cells in total).

      • Ano-name says:

        Hi, i have blue/cyan 18650 cell (like the first samsung photo in your post)
        It is write : ASO FN11002EH 400452 on it with a code barre under. Can you tell me wich brand and mAh this cell have ? Btw thanks for that post

      • xaeus says:

        The are made by Shenzhen, China. Should have 2200mAh capacity, like the Samsungs 22s.

  63. Zaahir Parker says:

    Hi there. I have a clear wrapped battery but I have no clue which it is. I want to use the battery for vaping. The only markings are printed on the actual battery itself.
    which is printed below each other and elsewhere it has R4D2 printed
    On the positive terminal there are 3 prongs connecting.

    • xaeus says:

      Can you post a picture ? The markings are not too relevant. For example, R4D2 is a water resistant steel specification.

  64. Danko says:

    Hello there,
    I harvested some cells from my Acer laptop battery, and didn’t find anywhere that mark.
    They seems to be Sony, but I did not manage to find a second-line tag anywhere.
    SE US18650GR
    T 6F1250(or Q)J25B

    • Danko says:

      … thank you in advance 🙂

    • xaeus says:

      Hello, they are certainly Sony. What capacity rating did the acer battery had ? We can tell the cell capacity from that.

      • Danko says:

        good idea lol
        I think it was 4400mAh
        They was two in parallel in 3s (six of them).
        This means each should be 2200mAh, great!
        Thanks. Second line mark was very confusing.
        Anyway, xtar vc4 coming soon, and I will measure what left from their capacity.
        Best regards!

    • xaeus says:

      Yes, if the pack was 4400mAh, the cells are definitely 2200mAh, which are very long lasting, I still have plenty in use. However, the 2200 marking should of started with G5, not 6F. Maybe they are a more special model.

      • Danko says:

        Thank you man, you are very kind.
        Poor battery back 🙂 It was dead after using brand new laptop for a few months. Finally after 9 years I brake it apart and as supprise found 6 cells all good. Every one was about 4.1V.
        Must be electronic in battery pack.

  65. Loren says:

    Hello! Thank you so much for this post and the help you give others. Can you ID these cells?

    • xaeus says:

      They’re most likely re-brands usable for flashlights. They may have 2200mAh.

      • loren says:

        Thanks. These are in a large 7p13s generic pack I inherited with 3 dead groups. hopefully can rebuild the pack to a 7p10s. Cheers.

  66. Roy Langoen says:

    Hi! Why are most of the 18650 batteries flat on top? My device, a door bell with camera, needs a higher top battery due to the design inside the case. Cheers – Roy

  67. JM says:

    Hi, really nice post!!
    Could you help me to identify these cells? Got from a broken Mobile Powerlive+ charger
    Thanks in advance

  68. Lada says:

    Hello everybody – i would like to ask about his one:
    Is it fake or not? I never seen similar Panasonic cells like this one.
    I tested capacity a it shows 730mAh/2.5W. But I don´t know how old are they …
    Thank you for help.

    • xaeus says:

      Hello Lada. The cell label looks authentic. It is a Panasonic 18650 cell, rated 1800mAh. Your tested capacity is like that probably because the cell is very old.

      • Lada says:

        Thank you for your reply. I have got them by friend, i tested many of them but capacity of 99% cells is bad (from 0,3Ah to 0,7Ah). Probably are very old if you say – it´s not fake.
        I make my own powerbank from grey 2900mAh Panasonic cells and it works great … so i was surprised from results of testing.
        Anyway, thank you for identification, you are the best – this page is very usefull – keep going…

  69. Rick Lees says:

    Hello, Thank you for all the great information. Can you identify these?

  70. Lars says:

    Hi Xaeus,
    Thanks for sharing your extensive knowledge! I have read the whole forum but can’t see that you have covered my question. I believe it may be of interest to others with similar applications.
    I have Garmin navigation chart plotter that needs new cells. The original cells are Samsung ICR18650-24B. The battery pack would typically power the unit up to 7-8 hours => average power consumption aprox. 0.35A.
    What would be the best cell choice today if I want to have long running times on battery and low self discharge when not in use?
    The battery control circuit on many Garmin battery packs don’t take charge if the battery runs to low. The unit usually shows “Battery missing”. A simple work-around is to remove the glued cover and stick two needles thru the battery pack wrapping (NOT the cell wrapping) to reach the poles. Now apply suitable charge current/voltage for a 15-30 minutes. If the cell is healthy it will now have charged enough to give >3.7V and show up on the “radar” for the unit. Now you can remove the needles and assemble the battery and attach the normal charging cable. Garmin have made tons of money selling replacement for fully functional batteries. Hope it helps someone!

    • xaeus says:

      Hello. Looks like your circuit has an over-discharge protection, which is normal for sensitive equipment. If some of the cells are in worse shape, they will over-discharge and you will have to apply the trick you mention (manual recharge) to use them again. Since the device used ICR18650-24B cells, you can replace them at any time with ICR18650-24F, which can be in plenty of supply on the market today. The 24F would be the fully compatible choice, but it’s highly likely that you can use higher capacities like ICR18650-26C or 26F. Those may not be as long lasting as the 24 series, though. From my years long testing, the most durable of cells were the 22 B and F series (which are of a little lower capacity, 2200mAh compared to 2400) but should resist a lot of years.

  71. Lars says:

    Thanks Xaeus!
    I am sure you are right about the over-discharge protection. What surprises me is that this happens to batteries the first year in use. My conclusion was that since it is “seasonal gear” on my latitudes (Scandinavia) the battery needs to be fully charged before put away for the winter. All the batteries I have done the trick on has been working normal after that. What is the over-discharge feature doing on the battery pack? If one would like to protect the unit from running on a to low voltage wouldn’t one put the low voltage watchdog in the unit…? Thank you very much for your suggestions! Any recommendations on EU web-shops for quality cells? Guess you are in Europe or Asia considering the time. /Lars

    • xaeus says:

      Li-ion does well in cold. A problem it would be to store them in too hot environment. I also store them fully charged, and I have plenty of cells that are 10 years + and still have full or near full capacity. The problem I noticed is in many newer cells. The overall quality decreased a lot starting with 2600mAh cells. If most of Samsungs, Sony and Sanyo 2200mAh cell are still fine after many years, for Samsungs there were big quality differences between the 2400mAh lots and I still did not find many 2600mAh worthy to keep on the long term.
      I cannot recommend shops because I get mine for various alternate sources. You should just be aware of fakes and take note that original cells cannot be excessively cheap.

      Over-discharge ‘annoyance’ can be happening per the full pack or per cell pair, depending on how the manufacturer wanted it. If you do change the cells, make sure there’s no tricky protection against that, like some of the power tools manufacturers use.

  72. Lars says:

    In this particular battery it is only 2 cells and the battery was purchased 2005. 13 yrs of use must be considered good…. Googled around but couldn’t find any recognized online source for the ICR18650-24F. What is the last letter (F or B on the original cells) indicating? Is it a letter for the generation of the cell model/type? I assume the cells we discuss doesn’t have any built in protection circuit? Any good or better alternative I can look for than the Samsung?

    For the general battery use in our house I bought a couple of dozen Eneloop and later some additional Fujitsu and a good MAHA charger. Haven’t bought a alkaline/NiMH battery in 8-10 yrs now. I charge them when discharged and stick them in the fridge.
    Imagine how much waste society could save if every one would do that. Thanks!

    • xaeus says:

      The letters generally represent the generations of the battery. I do see the supply is not as good as the last year, mostly because they now make higher capacities. Try finding 26Fs or 28A, maybe the supply is better.

  73. Bob says:

    I have a 6 X18650 cell battery pack, Black no markings on cells,any idea on who makes these cells and mil/amp ?

  74. Josh says:

    I have batteries that look almost identical to the Panasonic gray cells, except for some different markings on/under the wrapping. Can you ID?

  75. Ceza Yi says:

    I have this 5 x 3.7V cell 18V pack. Each is a ICR18650 3.7V 1500mAh. One of the cells is dead but I can not find a 1500mAh spare locally and not willing to order from China. Can I replace it with a 2200mAh cell ? or with a INR18560 1500mAh cell ? wihout increasing risk too much

    So my options are either putting a 2200mAh ICR cell in or a 1500mAh INR cell in. Either possible ?


    • xaeus says:

      If you say they are ICRs, then you can use any 1500mAh good cell. If you put a 2200mAh one, there could be a load balancing problem when charging and discharging the pack. If that pack is from a power tool, it should use INRs. So in any case, it’s better to use a 1500mAh cell.

  76. Ceza Yi says:

    Thanks very much sir ! Yes it is a power tool pack but it had ICRs in it. So you say I better use an INR 1500mAh to go with the four functional ICRs in the pack.

    • xaeus says:

      I’d get 5 INRs and use the ICRs for other things like flashlights, but getting only 1 is the second best option.

  77. Chloe says:

    Hello there! I have some 18650’s out of a power bank. On the box it says “contains MINTAX Lithium-ion batteries” 2200mah. They are dark sky blue and have a white band around the top of the positive. The code on them (of which google finds nothing) is ZZNY-18650N1 K18A02 3.7V.
    Are you able to tell me anything about these please?

  78. Ceza Yi says:

    Thanks, thats what I thought too but wasn’t sure the charger circuitry would work with 5 INR’s + the amount of soldering involved 🙂

    • xaeus says:

      Charging is fine, the high power cells do not need more current when charging compared to standard ones. All my tests concluded that the current drawn when charging is nearly the same.

  79. Ceza Yi says:

    Thanks again, I’ll remember that. For now, I ordered couple of ICR 1500’s from China..I can survive with hand tools for a few weeks I guess.

  80. Florin Oniga says:


    Can you please help me identify this accumulator, I cannot find an equivalent one on the market:

    It is from an Electrolux Ergorapido vacuum (about 3 years old). In the last months it started to work fewer and fewer minutes (now it is dead), I suspect too many recharge cycles for the accumulators.

    Does the second row of text matter much? I found online batteries with LGDAHB31865 but not with the sub-code 0065C063A4 131.


  81. berto says:

    Hi, could you help me figure out what batteries these are?
    I couldn’t find anything about them.
    Perhaps the ‘5C’ means it has a 5C rating, besides that I am stumped.

    Here are the links to my pictures:

    • xaeus says:

      If on the pack it says 8800mAh that would imply they are 2200mAh cells. The CJ marking is pretty universal, there are dozens of suppliers using it, so no conclusion from that. So if the battery has 4 pairs of 3 batteries in series, they certainly are 2200mAh. The original DV Samsung battery model has 4400mAh and uses 6 (2 pairs of 3) 2200mAh 22F or 22FM cells (similar in color to yours).
      So if you want to replace part of the cells, feel free to use Samsung 22s of any series. If you want to replace all of them, upgrade to 2600 mAhs (pink Samsungs 26Fs, G8 Sony, or anything else original) since they are pretty cheap now compared to a couple of years ago and you’d get 10400mAh (that’s 18% more capacity/uptime).

  82. Mike says:

    What about this one? It’s a fairly new pack (only 4 cycles), each cell has ICR18650P 2500mAh – and want to add 4s4p to this pack to increase the voltage. I don’t want to overdo it – just get similar cells to what is in there that will age at the same rate. Here is the original cells –

    Would these be most economical or am I better off with LG/Samsung

    • xaeus says:

      Get originals. You can add in parallel series of Samsungs, LG 2600mAh or even old 2200mAh or Samsung/Sony 2400mAh. Better than getting ghost cells.

      • Motsamai says:

        So guys i have ultrafine li-ion 18650 batteries with effective capacity of 7800mAh. Os this battery real?

      • xaeus says:

        They probably have around 800mAh. If you can’t measure, weight them. If they are 33-35 grams they are 400-500mAh, if they are 36-39 grams they can get at even a little over 1000mAh.

  83. Richard says:

    Great job Xaeus,
    Seen these 18650s 2400mah for my 4 cree torch @£4 each. But they weigh in at 55g (that’s a good thing isn’t it) Any thoughts?

    • xaeus says:

      The are repacked cells. They don’t even spell mAh right. (It’s Mega-Ampers-newton-meter-second lol).I doubt the weight is real. Hope it’s not the weight for all 4. Anyway could be worth getting them for testing; they should suffice for flashlights for the non multi-LED ones. Better get something like this if you want quality and capacity: It’s only 1£ difference.

      • Richard says:

        Thanks for the quick response Xaeus, Unfortunately the flat tops are no good for me I need 4 button tops for my fast draining Skyray torch. Might give the heavyweights a go tho.

    • xaeus says:

      I never use buttons. I use flats + a little piece of metal if needed. I do like that on my 7-LED 3×18650 flashlight that was designed for button top cells. I just got a metal round piece from old HDDs that is 6mm in height just enough to compensate for the difference and make a good contact. The piece is even insulated on the outer side, so it’s fine from that perspective too.

      • Richard says:

        Your’e right, I really should invest in a decent soldering station, I wouldn’t want to use my old branding iron near lithium. lol.

  84. katie Jae says:

    More curious than anything, I bought a flashlight that came with two dark sky blue 18650’s with a white cap, “5000” mAh and I took pics but I don’t see how to upload them. The batteries are labeled Mixxar TR 18650 5000mAh 3.7V, they are PCB protected, very little other info. I found their website at, scroll down just a little to the flashlight and it shows the two batteries, can’t read anything, and if you click it takes you to AliExpress and says it’s nolonger available. BTW the flashlight is terrible.

    • xaeus says:

      They are just low cost fakes, just like the flashlight probably. Just think that in my country I can get a flashlight + 2 batteries and charger at under $20… but everything is junk quality. Batteries are 200-400 mAh, the charger can break after just a few uses, the flashlight LED can burn after just a few hours of use, the flashlight on/off switch breaks because its components are made out of scrap. So I end up donating the batteries or sacrificing them for science, upgrading and selling the charger and using the Al case of the flashlight for other purposes like laser upgrades.

  85. Woody says:

    I’m searching to replace my 18650. Is the JYD code, which is at the start of my battery designation important, as I have seen other batteries with ‘TR’ ; ‘ICR’ and ‘DTK’ amongst others.
    Thanks for the great information, I’ve learned a lot !
    I’d like to post a photo but cannot see how to do it, sorry.

    • xaeus says:

      What do you want to replace ? Is it a laptop battery or something else ? ICR/IMR/INR are the chemistry markers (normal, medium or high current). The others are manufacturer specific markers.

  86. uberlieber says:

    greetings, your info here are very detailed, thanks, i have this quote for a battery pack:
    7S6P 24V 15AH Li-ion Battery Pack 2kg in weight 84$us
    and it state it will provide 24 volts continuous 14Amp … unfortunately i have no picks to show;
    can you tell me if this is possible at all ???

    • xaeus says:

      1. 7S6P does mean the equivalent of 24 V (from the 7 in series cells) [Good thing].
      2. 14A continuous would mean 2.33 A from each cell. [Neutral], over 2A continuous only works on very recent normal current batteries].
      3. 15Ah means they use 2500mAh cells [Good thing].
      4. 2Kg would mean 47g/cell if we don’t count the case; this means original cells at around 45g [Good].

      So yes, it’s definitely possible and the pack looks like it’s built from original cells, the only thing I would not 100% guarantee is the continuous discharge rate (it may be achieved but with overheat).
      Final verdict: good, you can get it.

      • surv says:

        thanks for your prompt reply, ok, i will go and get it, and in addition provide
        cooling fans in the area where the batteries will be placed+used ;
        have a good day !!!

  87. surv says:

    i have received an offer:
    28 samsung 3500mah cells, the weight is about 1.5kg(embedded in ebike battery box)
    so each cell must be approx. 43 to 50g …it suppose to be able to put out 24V 14ah…
    by the weight, it sounds real, i like your opinion, thanks in advance

    • xaeus says:

      1. To get 24V equivalent you need 7 cells in series. [Good]

      2. 14Ah split to 4 cells, makes 3500mAh per cell [Good]

      3. You say W8/cell is over 43g [Good]

      So from that it does look like a pack built with original cells. If they’re really Samsung 35Es it would be really nice as they support good discharge per cell.

      Final verdict: get it, all math complies.

  88. Alex says:

    IMPORTANT UPDATE! Sanyos are labled. They are just labled by barely melting the plastic wrap. They don’t print them and theyre super hard to read. But yes, the wraps are labled.

    • xaeus says:

      I have both old type printed with black and melting-mode. Both are unreadable, so I would not call that labeled. You can’t get anything except for the manufacturing date even if you read them.

  89. Elias says:

    Hi great article and well written it helped me identify some sony g5 batteries but i also have some other blue laptop batteries(they might be lg) that i could not recognize so i hoped that you could help me recognize them.
    In advance thanks!

  90. I have a blue CJ battery I’m trying to ID to refurb my own laptop battery pack.

    It’s flat top, and reads 18650 6K52613 35566

    If I decide not to refurb, I guess I could use the good ones in my vape?

  91. Foobar says:

    What do you make of these please ? They are almost same purple as your background colour.
    They are labelled exactly thus ( inc char case and spacing ) :-

    ACI 18650c-3. 7V
    MINTAX 14F20

    Is ‘Mintax’ a brand ? It only seems to be associated with ‘Juice Bank’ USB power bank devices as far as I can see. Thanks in advance !

  92. Cj Oakman says:

    Can’t find any info on this cell. It’s out of a Lenovo laptop battery and is a dark red with light blue ring on top. In black faded print it has LEIM3A6 072439 on it and L23A stamped into it. Also there is a “D” towards the top of the cell. Thought there would be more stamped into it like my Red Sanyo’s, but nothing besides the L23A. Looks like I can’t post pics, so this info is all I can give. Thanks!

    • xaeus says:

      Capacity can be determined by the battery specs…but a picture would help. Up it to something like imgbb or any free pic hosting.

  93. Hi Xaeus! Where can I find some information (datasheet or electrical features) about “INR18650 2200mAh 10A” made by Camelion?

  94. megan says:

    cgr18650cg e mh12210 i got this in my dell 1420 battery , it used to give me 3 1/2 hours of use time,it was good battery but it was flashing orange light blinking,so i got it out and found 2 batteries arent working..other are working when i tried to lit a led bulb.i dont have much idea what to do with it,whether to sell it but where ! or to make just a 4 battery back cell for my laptop .. looks like its a panasonic battery -source internet.

    • xaeus says:

      That battery has indeed panasonic cells.They may be 2150 or 2250 mAh. Tell the color of the cells to see which type.Anyway, you could just replace the bad ones.

      • megan says:

        its purple color(oops its too late i am replying to this message lol) and thanks for the reply,thinking of putting one battery out 4 for my hbs370 blutooth and other 3 for making a powerbank,what you think about bluetooth and its charging time etc.. also i tend to keep the bluetooth battery along with this one purple battery too..

      • megan says:

        i found the power of it,its 2600mah

  95. I’m trying to identify this 18 650 cell that came out of a portable cell phone charger it is ( pale green ) and it says….
    18650 NBA12518 924012


  96. I’m trying to identify this 18 650 cell that came out of a portable cell phone charger it is ( pale green ) and it says….
    18650 NBA12518 924012


  97. Bon Bryan Lee says:

    My e-scooter distributor claims that these are samsung. My scooter is TNE. Please confirm. Thanks!

    • xaeus says:

      Samsung never use that type of orange color for their cells. Even orange LGs are a different color, so I doubt they are of any of the big brands including sony, sanyo.

      The only way those would be samsungs is if they took some older ones and repacked them (new casing). What rating does that battery have ?

      • Bon Bryan Lee says:

        Unfortunately it’s already packed up and cant look at them anymore. But they rated that bunch at 26ah capacity running on 48v with 2 1000W hubs. With that image and the values I provided can you compute the capacity of each battery?

  98. xaeus says:

    Yes, they should be 2600mAh cells (10 parallel and packs of 10 in series).

    • Bon Bryan Lee says:

      Thanks you’re awesome man! Total noob on batteries just making sure I got what I paid for 🙂

  99. Bon Bryan Lee says:

    You’re awesome thanks! I’m a total noob on batteries or electronics altogether. Just making sure I got what I paid for 🙂

  100. christine says:

    Great post Xaeus.
    I have bought a solar light and it has battery ICR 18650 2200mah 3.7v written on it.
    I could really do with a battery that I do not need to recharge and just replace.
    Any idea what I can use?
    Thank you 🙂

    • xaeus says:

      If you use standard batteries the solar charging part becomes useless. You can use 3xAAAs in series and make the equivalent of this cell.

    • surv says:

      Greetings Xaeus,
      its not important whether you remember me or not, i posted a question and your answer+advice
      were FANTASTIC, i got those battery packs, and i have been keeping them “un-abused”,
      and i followed your instructions and they are in quite GOOD SHAPE,
      again, MANY thanks for your GREAT HELP+ADVICE+INFO ON THIS WEBPAGE!!!


      • xaeus says:

        Glad you found some quality ones. Do you intent to do anything special with the cells in them ?

      • surv says:

        yes sir, i am building a humanoid robot for my own use, i am loosing my control of my right leg;
        the battery packs are for driving 6x 500kg/cm servos, if my calculation is correct, the battery
        packs will last 2 hours of walking, and will need to be charged every 12 hours,
        take care, and again thanks for the help+info on these lithium battery packs

    • xaeus says:

      Just put them in series. There are also pre-build cases that arrange them in series, something like this:

  101. Keith Wood says:

    I have a 18650 purple 2 pack I took from my BTS200 (AT&T) bluetooth wireless speaker. It no longer takes a good charge and only lasts a few minutes so I’d like to replace it. The batteries are completely unmarked, and look just like #10 in post from d_t_a, which you said were re-manufactured and could be anything. Does it matter what amp batteries I use for this unit? I’d like them to last as long as possible so more amps is better, right? Do you recommend a particular amperage, or one that was probably used for this unit? No info available at all online. The 2 pack is wired in parallel with a tiny pcb chip set. Is it possible that using the wrong amperage could blow it out? That would be death to the unit since I doubt I can find that again anywhere if its specific to this unit. Thanks!

    • xaeus says:

      The required current can be calculated. For example, if your speaker has 10W consumption and powers directly from an 18650 (3.7V or 3to5 as per specs) you would need 2 standard cells in parallel or one higher current cell like the ones in lower power drills that support 10A. No, using higher current will do no harm. Current is drawn as needed from the cells. The problem would be if the cell’s supported current is lower than the drained one, in which case the cells will overheat. So my recommendation is to test with 2 standard cells like samsung 2600mAh (the pink ones) and if there is no overheat, then everything’s fine. If there is overheat, go for higher power cells.

      • Keith Wood says:

        Great thanks for the advice. Do you think the pcb on the existing batteries is specific to this wireless speaker unit, or that its a generic controller that came along with the battery 2-pack to protect/control it? I’m assuming its some kind of charging controller/limiter. I’ve looked online but haven’t found any pre-wired 2-packs for sale, much less with pcb controllers built in. It would be nice if I could find one online, to spare me that building project, and maybe problems reusing this pcb controller on a new battery set it wasn’t designed for (or the controller may have failed). Do you know of any online sources where I could buy a 2-pack wired parallel like this, with controller? Otherwise, if the controller is specific to this speaker unit, I will just try rebuilding the 2-pack with new batteries… Thanks.

    • xaeus says:

      No need to hunt for what controller it is; there are dozens or even hundreds of types. The easy way to just get 2 batteries and replace the existing ones. If you don’t know how to solder them, go to any electronics guy and he will do it in 1 minute. When soldering, the thing you must make sure of is not to overheat them, so better let an experienced person do it. Spot welding is the better way, but then such a machine is expensive.

  102. floydmueller says:

    Do you know what battery this is? It is inside a battery case from “Darfon”, who manufactures the batteries for Vanmoof eBikes, and I would like to replace them.
    Thank you so much!

    • xaeus says:

      That is an LG of 3000mAh.

      • floydmueller says:

        Great, thank you so much! One more question please: I would like to ship this battery overseas, via plane, and a courier tells me that they need a safety data sheet to be able to put it on a plane. I cannot get a reply about this safety data sheet from the manufacturer, any idea how I could ship this overseas without one, please?

    • xaeus says:

      It’s the shipper’s responsibility to ensure dangerous goods are correctly declared, packed and labeled with the right documentation for the countries of origin, transit and destination. So if you do the shipping you must make sure everything is in order according to applicable law and safety rules.

      Here’s what you need to know: Li-Ion Air Transport

  103. mat says:

    can anybody tell me if my batterys are good or fake pls
    samsung SDI
    5 2H43

    the code under the green wrap is L8HO
    i have a bad feeling about these.

    • xaeus says:

      Hello. Yes, they are suitable replacements and you will get almost double the capacity. So your battery will last twice as long but will also take x2 time to recharge.

  104. Dan says:

    I’ve got all different kinda cells… I rip apart the cell phone battery chargers for their batteries and have found all different colors and capacities. Probably all of them fake, but they work and are rechargeable, and abundant, and cheap… so, I use them for my flashlights and other things.

  105. Daniel says:

    Good day. First I’d like to say thank you for your post, they help greatly to clear up the fog. I’d like to ask if you can identify this battery? I see purple is LG, but my battery is 2500mah. The battery comes from a Solar Tiki torch light and speaker, manufactured by ION. Any help would be greatly accomplished.


    • xaeus says:

      Can you post a picture of it ? Dark purple LGs are 3100mAh or 2800mAh. How did you determine that it is 2500 ? The next lower capacity LG is the 2600 one and that one is orange.

  106. velo ravel says:

    What is the difference between

    • xaeus says:

      They all seem to be iterations of the same INR 18650 3350mAh from LG. The difference may indicate the generation of the cell (A being 1st, G last).

  107. Carl says:

    I can’t remember what pack I pulled them from, but I have half a dozen cells with a red wrapper and purple cap insulator rings.
    At a quick glance there is only a series of numbers printed on the wrapper which appear to be a possible date and factory identifying stamp.
    While rubbing the glue residue from the cell I felt what I thought were scratches on the wrapper, but they turned out to be an embossed code which reads: Sanyo K YA UR18650A R1112 0083.
    They seem to be genuine cells and I’m almost positive that I got them from a well know branded laptop battery pack.
    Other people on secondlifestorage have been finding these batteries also, so I don’t believe that the all of the purple capped red cells are faies

    • xaeus says:

      If they are from a laptop authentic battery they are certainly original and the red ones with purple cap you can find on the secondlifestorage database.

  108. Nick says:

    I have a 2 pieces of 18650 battery from solar motion sensor light 1626B , and battery is marked HL 19A141200J-08 . I dont find nothing about this battery. Im from Romania, and this product its from China (made in China). Have a good day everyone.

    • Nick says:

      You know what is capacity of this battery ?

      • xaeus says:

        You don’t really need to know. Just put 2x3000mAh standard cells in there and you’ll be fine. If it had lower cap cells like 2000mAh there’s no problem if you use higher capacity, it will only last longer when charging and discharging.

    • xaeus says:

      If it’s made out of 2 18650s you can replace them with new ones. Since it’s a solar thing, you don’t need high current cells.

    • shaun says:

      i have cells labeled HL 19j2612001-08 IT would be nice to know where the batteries are from that gtl used for the 10000 mah white battery.

      • xaeus says:

        A picture of them would help. And how many cells in the battery ? If 5, they may be 2000mAh.

  109. Max says:

    Can you help me identify these?

  110. Jacob Harding says:

    Quick question.
    I opened up some Kobalt 24V battery packs. The 2ah pack used the Samsung 20R and the 1.5ah pack used the 15L. The math works correct but what is am confused on is that the cells are exactly the same weight. Wouldn’t the higher capacity cell be slightly heavier due to containing more lithium?

    • Jacob harding says:

      Also I was curious what the repercussions would be if I were to replace the 20R with 22s or 24s. Looking to get more amp hours out of the same size pack. Obviously there must be an issue doing this or the manufacturer would not have to increase the size of the packs/number of cells for higher amp hour ratings . Is it a heat issue or some other hazard to doing this?

      • xaeus says:

        There is no danger in replacing cells with higher capacity cells. I do that in most of my power tool batteries. Instead of 20Rs I’d use 25Rs since they seem to be pretty cheap in many areas at this moment. What you get is the extra capacity, but also charging will take proportionally longer.

      • Jacob harding says:

        So are you saying that the higher capacity cells take disproportionally longer to charge than if you were to achieve the same ah rating by running more smaller cells in series? I’m just trying to figure out the downside to the manufactures using higher capacity cells. Instead they run more cells in series which makes for a heavier/clunkier battery pack. I can deal with the longer charge time if it means I get a smaller lighter battery pack. Fire and exploding packs is my biggest concern.

      • Jacob says:

        I think I meant to say parallel not series.

      • xaeus says:

        You can safely add more in parallel if you can mod the case to fit them.

      • xaeus says:

        Math is simple: if your 2Ah battery would charge in 2h, if you upgrade to 25Rs and make a 2.5Ah battery, it will charge in 2.5h. There is no other danger of any kind. To get max amp put samsungs 3000mAh in. If you need light batteries use a single pair. If you need them for heavy tools like a chainsaw, use many in parallel. My 12Ah has 5s4P.

      • Jacob harding says:

        Thankyou for your input.
        I’m not trying to beat a dead horse here but there has to be some reason why power tool manufacturers are using stacks of smaller capacity cells rather than just upping the cells to 2500-3000ma. Large heavy battery packs are probably one of the most negative issues in the cordless tool industry. I have opened up several different brands of packs (DeWalt, Bosch, Kobalt,etc) and have found cells ranging from 1500-2200. There has to be some reason why they get are not using the higher capacity cells. Are they cost prohibitive?
        If they could simply replace the 2000s with 3000s then they could achieve a 6ah battery with the same size pack and weight as a 4ah but we all know they instead they run another series and make the pack bigger and heavier. They have to know the consumers want smaller lighter battery packs. What gives?

      • Jacob harding says:

        OK never mind -after some research I figured it out. It turns out some manufacturers such as Bosch with their new Core series of batteries and Dewalt with their low profile three amp hour battery are doing this.
        Hopefully the rest of the manufacturers will catch up and start using higher milliamp cells for more amphours and smaller packs.

      • xaeus says:

        They do use 3Ah, but they are a little more rare atm. 2.5 ones are on plenty supply, Milwaukee it’s been using them for years now. And they use 3Ah cells on the 9Ah and 12Ah batteries too. The thing with the higher capacity cells is that they have lower durability. A battery with 1500mAh cells it’s more likely to last longer over multiple uses compared to 2500+ ones.

    • xaeus says:

      Hello. No, the weight should be pretty close. Practically anything of 45g+ should be an authentic cell.

  111. Joseph Haggerty says:

    I have an Electrolux Ultrapower vacuum. The battery is a grey wrap with
    and below that:
    P277JO33AL 131

    Should I go for any grey wrapped like the one you have in your article? does the P277.. mean anything important?

    The complete battery pack is 7 X 3.6 batteries.

    • xaeus says:

      That an LG of 1500mAh. No, the P-series is not relevant. You can replace those with Samsung 15Q or other equivalents. You can also put higher capacity cells like 20Q/R if you want to make it last longer.

  112. Phil says:

    What batteries are these? Just found them in an unmarked power bank and want to know their capacity!


    • xaeus says:

      They are mintax, which usually are pretty good; they may be 2400 or 2600mAh. Does your power bank have a realistic mAh rating ? Should be rated at 7500mAh.

  113. Cody says:

    Hello, any idea what these are? Pink-Purple color. INR 18650D250 3.6V 2500mAh (9Wh)? they are from a Gudzen Moza Air 2 Gimbal.

  114. Alfonso Paez says:

    Excelent and safe money.

  115. Nick rogers says:

    I have a redish pink 18650bout of a certified fell battery. The numbers on it are as followed..
    I HAVE SEVERAL top line stays the same bottom line changes each cell

    Top line = LKIM4BA
    BOTTM LINE=060313

  116. JP vries says:

    I know it is a 18650 cell
    I have a fake makita 1850b pack 18V 5Ah
    But don’t know the cell spec
    It is Cyan color (RGB: 80,255,255)
    And text on it is only
    QIXIN 18650 AC1HBBF
    please help

    • xaeus says:

      Those are Chinese cells; had some a while ago and they were 2200mAh, but they are not high power cells. They will work in something like an impact wrench, but will not be good for anything with high power like circular saws or thinks like that. It’s best to measure capacity of them to see what exactly you have.

  117. Jonny Lindholm Christiansen says:

    I’m confused, I can’t figure out which ones are high drain cells.

    but, is it possible to find batteries in laptops that can be used in Milwaukee M12 and M18 batteries? The cells are called Samsung INR18650-13Q

    • xaeus says:

      It’s easy for Samsung: normal drain are tagged A to F (G,H maybe for new ones) and high drains are P,Q,R,S (T new ones). Do not use laptop cells for Milwaukee tools. Milwaukee tools are no#1 in the world atm in power tools. You may get away with it for an impact drill, but for any tool that actually drains a lot of power (like any cutting tools) will fry your cells. 13qs are easy to replace, you can always put 15Q instead or even higher like 20Q/R.

  118. Martin says:

    What about this one? Found in a power bank.

  119. Chad says:

    I have some cyan colored cells that came from an access aspir one laptop battery. The markings are
    First line, “ZH 18650 2000mAh 3.7v 7.4wh”
    Second line is a barcode
    Third line, “2019K08”
    I’m wanting to know the continuous amp drain.

    Thanks in advance.

  120. GRAHAM JOHNSTON says:

    Hi Guys,
    Please can you help, i need to replace the cells in my Makita li-ion BL1815 18v 24Wh 1.3Ah battery. there are 5 and one of them in one battery is done and the 5 in the other battery are done. The code on the side of the cell is SE US18650Vt with T C113WVA26B on the bottom. It seems its an old sony cell but I cannot find a replacement. I dont know what one I can buy to replace. Can you help? thank you Graham

    • xaeus says:

      Hello. Those are Sony of 1300mAh, but you can safely replace them with samsung 13Q (also 1300mAh), 15Q/L (more capacity) or even 20/25Q/R if you want a lot more capacity.

      • Graham Johnston says:

        HI Xaeus

        Thank you for the answer. Greatly appreciated. How do you know the details if i may ask? Like the 1300mAh? Also if i replace one battery with more capacity with 4 existing will that not make more problems? Do i need to replace them all with same values? Thank you again Graham

    • xaeus says:

      If you don’t know the series of the cell, you may determine capacity by the general battery rating. Since the rating is 1.3Ah and it has only one row of 5 cells, the capacity of each battery is the same. If there were 2 rows of 1300mAh cells, you would have a battery of 2.6Ah capacity. To replace and get higher capacity you must replace all cells. If you want to only replace 1, use the same capacity as the rest are.

      • GRAHAM JOHNSTON says:

        Thank you again. Can you point me to a reputable supplier of the battery i need both the one that is a direct match & the higher capacity one? Is it possible to put 5 higher powered cells in to make the battery last longer and be more powerful? is that how it works? Again thank you all very helpful to me. Graham

    • xaeus says:

      Yes, you can put 5 Samsung 30Q/R/P cells and get 3Ah instead of 1.3. It will last longer and take longer to charge. Authentic Samsung 30Q (INR18650-30Q) can be found on many suppliers, it will depend on your area. As long as it’s a trusted supplier that does not sell junk like fake-ultrafires you’ll be fine.

  121. Andy says:

    Can you identify mha and maker of this please I see nothing on net with similar code
    ISR 18650 – A1 17g

    Does this make it a 1700mha??


  122. Mohammad Kananah says:

    You said that LG has te color’s you listed above , but i do have green ones started with LGABC and some others with LGDBC , when i searched for them, i found that the LGABC got 2800ma, what do you think about it, by the way i didnt find anything regarding the LGDBC

  123. Brian says:

    On 2018.11.17 at 0312 you identified some ZZNY-18650N1 K18A02 3.7V, I have a pair of cells out of a bad 4000 mAh battery back that are the same blue with a white ring at the top marked ZZNY-18650N2 K17J13 3.7V -. I can guess the maker and approximate nominal capacity but what can you tell me about them?

    My goal is to use some 18650 cells in a drill driver battery, and whatever is left over to use in flashlights.

    • xaeus says:

      Those are normal current cells, not recommended to be used on powerful drills. If your tool’s consumption won’t drain more than 1A max current you’ll be fine. If you drill is something like the Czech fake Dewalts then it will work, but in an original brand they won’t be able to produce enough discharge current; you will need high current cells for that.

      • Brian says:

        Thank you! I’ve ordered some new high-draw cells. It is a rebuild from an old NiCad a la several youtube videos.

  124. guy tremblay says:

    Hi! I have Dewalt cordless tools with 20 volt max batteries, some cells are death, there is no real id on the cells, all I can see is that they are red with a blue ring at the end just like the sanyo RGB,255,0,0 and on the bettery pack it say 2000mah and 40 Wh . Does any 2000mah will fit?

    • xaeus says:

      Hello. You can use Samsung 20Q which are 2000mAh or Samsung 25R which are available almost anywhere and cheap. You can make the battery 2.5AH instead. Even Samsung 30Q are good if you can find any, cheap.

  125. Adi says:

    Excellent description.

  126. Lynda or Gary Collins says:

    Looking for a compatible battery in US to a 8800 mAh 18650 4.2v 9.6Wh high discharge preformance Li-ion rechargeable battery.Can anyone help?

    • xaeus says:

      9.6Wh is not a high discharge, not even medium. To get 8800mAh it’s easy now-days. 3 good Sanyos will give you ~ 10000mAh and 10A discharge as bonus.

  127. Omar says:

    Can any one tell me about
    INR 18650D250 battery.

  128. surv says:

    greetings Borg, can you help me on how can i determine: whether these lithium-ion
    batteries have protections to stop from fully discharging… is this what i am looking for:
    End-of-Discharge Voltage:2.0V cell ???
    thanks again, please stay healthy !!!

  129. Duc Vu says:

    Thank you Borg for the very informative writing.
    I have a 14.4V Black & Decker Cordless Hand Vacuum which would need the lithium-ion battery replacement soon. Machine runs for few minutes and stops.
    Could you identify the mAh of the reddish color 3.7V battery having this marker:
    And do you suggest we solder the tabs to put the batteries in series ourselves, with any precautions?
    Thank you in advance & be well.

  130. Emma says:

    I got some 18650 cells from a power bank, sky blue in color with no writings whatsoever…….. It has a white ring ….. I need help in identifying it’s capacity

  131. Pascal Maradan says:

    hi, awesome help on 18650 batteries jungle…
    I wanna replace all cells into my e-bike battery pack, which contains 42 cells, all light red (not purple red), light blue ring, labelled SANYO and a big D, and also a common number “A SF6E66”.
    I doubt they are all 2600mah.
    Have ever seen this kind of cells ?
    Thx a lot

  132. Shakingninja says:

    Hi, i want to replace the battery of muy kicker kpw 1.
    The pack label ICR18650P 3000mah 3.7 (2 batteries inside), can i replace it with higher capacity?
    Can you recommend a replacement,
    Thank you verymuch…

    • xaeus says:

      If it’s ICR it’s easy, you can put practically any 18650 instead. Go for hi-cap ones like NCR18650GA Panasonic (Genuine) 3500mAh.

  133. Wrekt'Em Racing says:

    These were pulled out of a non-OEM replacement laptop battery. Casement listed 11.1V 5200mAh/58Wh
    Six cells contained in the casement in total.
    Cell wrappers are a light seafoam green color and labeled: ZH 18650 2000mAh 3.7V 7.4Wh with no steel case markings.
    Cells test 4.16V but max out my 10 Amp multimeter and get warm very quick.
    Any thoughts or further ID?

    • xaeus says:

      I have tested ZH cells in the past (2600 mAh), they are good enough and very cheap. Not sure I saved the test result somewhere. You can find for sale on Alibaba. Since they are 2000mAh yuor battery rating would be 4000 not 5200.

  134. OK1 says:

    Hey Xaeus,
    1st off CUDOS for doing 5+ years of battery identification for random’s on the internet.
    2ndly I recently bought a replacement power drill battery and found it has the below cells in it.
    I believe its a 5S 2P configuration (18v drill) can you confirm their brand and capacity?

    • xaeus says:

      Hello. There are manufactured by Henan Prospower Technology Co. Ltd. They are high current cells (15-20A/ 15C). I did not figure out yet their coding, the ones that start with “19” I found to be 1300mAh cells, so these with “20” may be 1500 or even 2000mAh. But that you should tell from the general battery capacity. If it’s 3Ah you’ll have 2 rows of 1500mAh cells.

      • OK1 says:

        Hi, Thanks for the reply,
        The battery pack is labeled as 5Ah so they would need to each be 2500mAh cells (there is 2 rows of 5 cells, 10 total)

  135. Abdul says:


    I have Sanyo batteries in my laptop. Its a pack of 9 cell.
    Specification is here

    Can I replace this with

  136. Abdul says:


    I bought this cell

    in replacement for my original

    Specification of new cells looks very confusing, can please help me decode and let me know if its at par with my original cells.

    • xaeus says:

      It’s an improvement compared to the original cell. 3C discharge instead of 2C and a little extra capacity. So it’ll work fine, just make sure to replace all cells, not only some of them.

      • Abdul says:

        It says
        Rated capacity(Minimum) 2750 mAh @ 1 C
        Nominal capacity(Typical) 2900 mAh @ 0.2 C
        Nominal capacity(Minimum) 2800 mAh @ 0.2 C

        Does this mean nominal capacity is 2900 / 5 ?

      • xaeus says:

        For laptop consumption there should be nearly no difference. Where did you come up with 8500mAh ? If there are only 3 cells in series you get around the nominal of 1 cell. near 3k is excellent. To get 8500+ you would need 9 cells (3series x 3parallel).

    • xaeus says:

      No. At high current you get a little less than the 1C capacity. If you consider the 2750 mAh rating @ 1C, you should still get close to that up to the 3C, which is the cell’s max discharge rating. (Exception to this are the very high power cells like the Samsung Ts that have high capacity difference from 1C to 5-10C, but not the case here).

      • Abdul says:


        2700 is rated capacity at 1C but Nominal capacity(Typical) is 2900 mAh @ 0.2 C. is the seller cheating by mentioning rated capacity at 2700 and actual capacity is much lower?

        Asking this because I have replaced all 9 cells of laptop pack. Ideally it should give backup of 8500mAH but in actual I am getting 2977mAH.

        Earlier laptop use to work even when battery voltage was 10.5v but now it goes into suspend mode at 11.2v

  137. Otto Büchler says:

    Hello, I would like to ask you about identification of this battery. I manage to get them from powerbank.

    • xaeus says:

      I encountered these a while ago. I think they are 2000mAh originally, 1C discharge LiNiMnCoO2. I was not able to ID the original manufacturer. What was the rating of the powerbank and how many cells it had?

      • Otto Büchler says:

        Hello, the powerbank was 10 000 mAH with 5cells.

      • xaeus says:

        Well that confirms that they are 2000mAh cells. If you want to upgrade, get some bak or other similar cheaper brands that are 3000+ and you’ll have a 15 Ah bank in no time.

  138. Titi Titi says:

    I got battery pack for Makita 18V 5A for drill , light purple color with no spec, I need help in identifying it’s capacity.Thank you sir. [img][/img]

    • xaeus says:

      Since they came from a 5Ah pack, they should be 2500mAh cells. Probably specs identical to the LXDs 2500mAh found on AliExpress. Those have 3C discharge (max 7.5A) Anyway, if you want to rebuild the battery, get Samsung 25Rs and you’ll definitely make it 5Ah at a high discharge current. If it’s not a very powerful drill you’re using, you can put cells with under 10A discharge, but I would not generally recommend that.

  139. Titi Titi says:

    • Titi Titi says:

      Thank you, Anyway, This battery It write down + RH YG18650 0F10C 21JU 3.6V – Is it could be 2100mAh?

  140. xaeus says:

    It can be a lot number. 2100mAh as capacity is pretty rare.

  141. Peter E says:

    Hi, very interesting post on batteries, glad I found it.
    Ive just taken my battery (Fake Dyson Stick Battery) apart as it recently failed, looks like one of the cells has gone open circuit. A couple of questions if you could please help 🙂
    The cells in this battery are marked as PROS18650P1 19L11 2Y they are coloured a Cyan blue colour, on the positive end you can see they are white underneath the cover. The label on the battery pack said it is 21.6V 3500mAH.
    4 cells are still at 4V but 2 are 0v would you advise changing all the cells or just the failed 2?
    I live in Australia, any suggestions where to get new cells from?
    The metal tabs on the batteries, where is the best place to purchase this material from?

    Thanks for your very informative post.

    • xaeus says:

      Hello, these are made by Henan Prospower Technology Co. Ltd. Not sure the label on the pack is indeed correct, as far as I recall the highest cap cells they had were 3350mAh at 0.5C discharge. You could do this in 2 ways: capacity test all remaining cells and get 2 replacements near the average capacity you get from the remaining ones or get new ones (3000+ capacities are easy to find now-days, there are many not so big brands that make quality cells; there are some Grey 3000+ marked T34 which are pretty good and cheap, around 2 USD per cell; I don’t know local suppliers from your area, but you should find plenty on online universal free to sell shops). For the metal stripe, you need to find pure Nickel stripe (0.1mm thickness is enough); it’s usually sold at 1-1.5USD per 1meter of stripe. Alternately you can extract some from battery packs or solder instead (see my guide if you need to do that, it’s risky for the cells).

  142. Ana Maritza Orellana says:


    • xaeus says:

      Si es para una energía solar no necesitas nada especial; obtenga cualquier buen 18650 que pueda encontrar en el mercado local (cuanta más capacidad, mejor, como por encima de 3000 mAh).

  143. Vasiliy says:

    Hello, can you please identify these? They come from a non-genuine Makita power tool battery. rated 5.0Ah 90Wh. I wonder if I can use individual cells for vaping in dual configuration?

    • xaeus says:

      Vanon uses usually fake-braded Samsung or LG in their packs. Vanon is junk and they take old or fake cells and place them in these tool batteries. You never know what brand battery you will get and some might have been used already. You may end up in luck with something relatively good, but generally it’s junk, don’t risk it. IF you want to re-use the cells, test them for capacity and for max discharge current.

  144. Vasiliy says:


    Can you please identify these?
    Safe for vaping?

    • xaeus says:

      Hello, answered in the other reply. Find their max discharge current and then you’ll know up to how much power you can safely vape with them.

  145. George says:

    Artykuł dobry . 👍Czy jest metoda rozpoznania daty produkcji ?

  146. Pascal says:

    Bonjour, ces batteries étaient dans un ordinateur portable ASUS GX72, c’est assez vieux, peut-être des années 2008. Pourriez vous me dire quelle est cette batterie svp ? en vous remerciant.

    • xaeus says:

      Bonjour, ceux-ci sont notés 2600mAh. Vous pouvez les remplacer en toute sécurité par LGC4 (2800mAh) LGHG2 (3000mAh, beaucoup de fournitures autour), Samsung 30E ou toute autre bonne marque de 3000+.

  147. Pascal says:

    Hello, These batteries were in a laptop ASUS GX72, it’s old enough, maybe years 2008. Could you tell me what is this battery? thanking you.

  148. uberieber says:

    good morning !!!
    i have been playing with these 18650(lithium-ion)…6S7P, and it has been fun, now i like
    to step into 18650 LFP( lithium iron phosphate)…again 6S but 2P…any advice ??? on
    bms and chargers ??? thanks !!! and have a great weekend !!! ,

    • xaeus says:

      The principles are the same, you just need more cells in series. Usually, what would take 3 Li-ion in series will need 4 LiFePo4s in series. As for the BMSs, plenty of good China ones on the market. They are less important compared to Li-Ion, but still needed. Make sure to use active ones for high current LiFePo4 “bricks” of 50-300+Ah.

      • surv says:

        WOW, thanks a lot…i will be a starter, and i am retired…and i am cheap hahaha…
        so i will start from the low end 25AH

  149. eby says:

    Many thanks for your blog, been trying to identify unknown 18650 found in Toshiba compatible laptop battery. Could not find any info regarding this anywhere, including an excellent 18650 identification reference spreadsheet found on google docs, hope it is yours.

    Can you help me identify the manufacturer and capacity of these ?. Sorry for the blured images, hope it is sufficient for you to identify these.

    TS 18650 01 3.7V 0115
    TN-001 141227 xxxxx(serial number?) H6

    L25B printed on + side


    • xaeus says:

      Hello, those may be Indian rebrand of 2000mAh cells. What is the official mAh rating of the whole battery?

      • eby says:

        10.8v, 48wh battery pack. Without knowing capacity of these cells, i can’t replace damaged cells.

  150. fatigueness says:

    How can I some revive dead INR 18650 that are not holding charge ?

    • xaeus says:

      If they drop back to zero volts after you disconnect them from power you can’t, they’re dead. For the ones that can actually hold over 3V after being disconnected, just cycle them a few times.

  151. xaeus says:

    48Wh means 2200mAh cells. I assume 6 of them. Do not replace them partially; replace all of them with 3000+ capacity cells. some of the working ones may have partial capacity and you replace the rest for nothing.

    • eby says:

      unfortunately replacing all 6 cells with same 2200mAh cells will cost me the same as compatible laptop battery which lasted 6+ years.
      3000+ mAh cells will be expensive and not sure if the battery PCB can manage these.

      • xaeus says:

        Doubtful. A 2200mAh or even 2500 one can be found as low as $1. And you can put higher capacity, the only difference is that it will last longer and take more time to charge.

      • eby says:

        Unfortunately retail price of local or Chinese branded 2200mAh is almost $3 per piece where i’m at(cheaper fakes are also available). If bought in bulk, 1box (100pieces), the price drop.
        Samsung and LG 2600mAh are almost $3-5 per piece in bulk.
        Compatible laptop battery is approx $18-20.

        Many thanks.

  152. xaeus says:

    If you find the whole btatery that cheat, get it.

  153. CookieMunster6006 says:

    I have a trio of batteries here I want to replace. They all read “sinowatt SW18650-30SE” and are light green. I’m assuming these are 18650 3000mAh because the device is rated for 9000mAh and there are 3 of them in here. The problem is, I cannot seem to figure out what the “SE” stands for. Does it matter? Can I replace these with Samsung 30QP or any 18650-30SP (which I see a lot of online)? Any help or recommendation would be greatly appreciated.

  154. Brian says:

    29e mean what on 18650 battery

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