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Bench Test Results: Sony VTC6A 21700...a great 30A battery, equal to Samsung 40T

Discussion in 'Batteries and Chargers' started by Mooch, Aug 6, 2018.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    These tests below only note the ESTIMATED ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, LG, Panasonic, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.

    Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of personal injury or property damage. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition.

    Testing batteries at their limits is dangerous and should never, ever, be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.

    If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.

    86A30A12-F3ED-42A7-A91C-FD21235B202F.jpeg 68F6FF4A-E8F1-41CD-8297-424E10201332.jpeg 7CD7A11A-C2D5-4F83-BE93-7CA5DB278C87.jpeg F34CB8F0-3706-40E4-9BC7-B01868EE2E1D.jpeg 4AFF64BC-E888-47F6-B938-1F3A04863205.jpeg


    Bottom Line
    This is the 21700 size version of the Sony VTC6A. It performed essentially identically to the Samsung 40T which was given an estimated rating of 25A/35A and 4000mAh by me.

    The Samsung 40T delivered a tiny bit more energy, Wh, at high current levels but the 21700 VTC6A ran a tiny bit cooler. Basically, they perform the same and are a fantastic choice for use at up to 20A-25A, in regulated or unregulated devices. At above 20A-25A the Samsung 30T is the better choice though due to its higher current rating and better efficiency (lower internal resistance).

    This cell now has a tiny QR code square on the bottom. Perhaps an anti-counterfeiting measure?

    If you have a VTC6A 21700, or one of its rewraps, that does not have this QR code it is probably an earlier sample. I have not tested them and I do not know their true ratings.

    The two cells I tested delivered 4107mAh and 4131mAh at 800mA (0.2C) down to 2.5V.

    I do not have the datasheet for this cell. I am TENTATIVELY ESTIMATING this Sony’s ratings to be 30A continuous and 4000mAh rated/minimum, 4100mAh typical/nominal.

    Two cells were donated for the purposes of testing by Vapcell (Vapcell batteries, chargers, vape batteries). Thank you!


    Continuous Current Discharge Graphs
    5E70DD0D-8345-43B1-A023-CADE9A635B83.jpeg F65EC232-BCC7-42C7-A72E-5955DC341898.jpeg


    Ratings Graphic
    86641D51-D94E-49B7-B77E-7AECEA8A1693.jpeg


    Performance Specs
    - DC Internal Resistance = 13.6mOhms (milliohms) average for the two cells.
    - Total energy delivered down to 3.2V at 10A continuous = 11.0Wh (Watt-hours) average
    - Total energy delivered down to 3.2V at 20A continuous = 9.8Wh (Watt-hours) average
    - Total energy delivered down to 3.2V at 30A continuous = 8.3Wh (Watt-hours) average

    I want to work for the vaping community full time! If you feel what I do is worth a couple dollars a month and you would like early access to battery availability and testing news and a say in what I test then please consider becoming a patron and supporting my testing efforts: Battery Mooch is creating battery tests and educating vapers | Patreon.

    To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
     
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  2. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser
  3. mimöschen

    mimöschen Super Member ECF Veteran

    Jul 15, 2016
    I thought the Purple Vapcell 24A 3750mah is the same cell as the Golisi S35 and not the VTC6A?:blink:
     
  4. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    It was but they might have switched cells or had two with the same ratings but wrapping different cells. Perhaps why it’s now in a black wrap?
     
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  5. mimöschen

    mimöschen Super Member ECF Veteran

    Jul 15, 2016
    They still sell and have both in stock though. Screenshot_2018-08-06-12-48-47.png Screenshot_2018-08-06-12-48-25.png
     
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  6. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    I don’t know what to say, they’re still selling two versions of what were the same battery for the samples I got.

    Perhaps ask Vapcell? They’ve been pretty open about what they rewrap.
     
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  7. Theo164

    Theo164 Full Member

    Aug 6, 2018
    Thanks Mooch!
    I got a brand new pair of these black vapcell rewraps with the QR code some days ago their voltage was low only 3.1 on delivery, cells seemed to be unused terminals was protected with the transparent heatshrink

    Im getting good battery life out of them into sxmini sl @ 30-40w
    Opus BTC3100 charge test result was 4120 and 4170
     
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  8. mimöschen

    mimöschen Super Member ECF Veteran

    Jul 15, 2016
    Ahem, I don't want to play the smarta** here, but I'm referring to your post, that the purple 21700 24A 3750mah is the same cell as the Golisi S35.
    Bench Test Results: Vapcell Purple 24A 3750mA 21700...conservatively rated, seems same as Golisi S35
    Perhaps I missed something?
     
  9. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    No, that cell was the same as the S35 at the time I tested it.

    It might not be the same cell now. Any China wrapped cell can change to anything else at any time.

    Earlier this year I received samples with that same purple wrap but they were VTC6A’s, still in their Sony wraps (yes, they were double wrapped). I was told they were just samples with unknown availability and that they weren’t sure when they would be sold or for how long, i.e., how many would be available. I decided not to test them.

    I do not know if the purple 24A 3750mAh Vapcell being sold now is the same China cell as the S35 or if it is a VTC6A rewrap. The black 30A 4000mAh Vapcell was a VTC6A when I tested it though.
     
  10. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Did you want to buy the S35 cell or a VTC6A?
    If the former, buy S35’s. If the latter then buy VTC6A’s or the black 30A 4000mAh Vapcell or another rewrap of the VTC6A (allegedly) that I will be testing.

    This way you can avoid dealing with the unknown cell under the purple 24A 3750mAh Vapcell wrap.
     
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  11. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Vapcell contacted me...
    The purple 24A 3750mAh cell has not changed. It should still be the same cell as the S35. It is not a VTC6A.

    The black 30A 4000mAh cell is the only rewrapped VTC6A from Vapcell.

    Vapcell only put the early VTC6A samples in the purple wraps for me to comply with shipping regulations as they had no stickers with the correct info. They wanted me to throw away the purple wraps. I did not understand that was what they were telling me.
     
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  12. mimöschen

    mimöschen Super Member ECF Veteran

    Jul 15, 2016
    Ah ok. Now I understand.
    Thank you for the clarification :thumbs:
     
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