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Bench Test Results: Queen Battery QB26800 20.4A 6800mAh 26800...great performing, high capacity

Discussion in 'Batteries and Chargers' started by Mooch, Jul 1, 2020.

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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, Murata, LG, Panasonic, Molicel, 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 physically and electrically protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition. Use of any of these batteries is AT YOUR OWN RISK.

    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.

    BE779503-50AD-442A-BD6C-79E3C832DC9C.jpeg C2B9DD10-49FA-45C5-AED2-DBB81EF4610F.jpeg F986C8C8-FEC1-47CE-855B-0F59AF1BF585.jpeg 969AFDDE-08E9-41DB-903D-F5601B005527.jpeg 643BD058-1F6D-4442-964C-B13A77BE6BAD.jpeg


    Test Results
    This is a great performing, ultra-high capacity 26800 size cell. Why test such a large cell? I was curious about it and other sizes like 20700 and 21700 weren’t used until manufacturers decided to support those sizes. I always like to see what is available in different sizes in case there are great performing cells out there we’re not using right now. This is one of them.

    If more 26800’s become available then the larger manufacturers might be willing to make the investment and create 26800 devices. Or a smaller company could 3D print some 26800 battery sleds and create a device using these cells for a relatively small investment.

    The QB26800 is 26mm in diameter and 80mm long, weighing about 121gms. Think of it as a long 26650.

    It is rated at 3C (20.4A) continuous by the manufacturer. There is a 5C (34A) “max pulse discharge current” rating for 30 seconds but that could be for just a single pulse so we cannot use that as some sort of “pulse” rating.

    This cell performed pretty well at 20A, staying at a decent temperature and without a lot of voltage sag, so the manufacturer’s rating of 20.4A sounds reasonable.

    This is a great cell for low to moderate power levels, up to 60W or so, beating the best high-capacity cells in other sizes. The QB26800 outperformed the Vapcell Red 20A 5500mAh 26650, delivering 15.5Wh of energy at 15A down to 3.2V versus 12.8Wh for the Vapcell 26650. The great performing (5000mAh) Vapcell G50 21700 only delivered 10.2Wh of energy.

    The capacity of the two cells I tested was 7177mAh and 7203mAh. This is decent consistency for cells from a China manufacturer and they significantly exceeded their 6800mAh rating. This kind of underrating rarely happens and I am wondering if there is either a large inconsistency between batches (or within a batch) or this cell has had its chemistry adjusted or might do so in the future. I am rating them at the manufacturer’s rating of 6800mAh.

    Two cells were donated for the purposes of testing by Oskar Triebe. Thank you!


    Continuous Current Discharge Graphs
    110BFBD8-4631-4EB5-B166-306B6BEBD1B5.jpeg 400A5382-A316-46B2-9DF1-C67F2137E57C.jpeg


    Ratings and Performance Specs Graphic
    E72F4C7A-8B85-42F0-BB3A-FD1EE85A94D4.jpeg


    QB26800 Datasheet Specs
    42110604-C319-4B3A-914F-B29B50EF6781.jpeg 5A0257A8-7BC7-4090-9D7C-E81F16CD22E1.jpeg

    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, battery and charger testing and 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. Barkuti

    Barkuti Super Member ECF Veteran

    Hello! What's up? :)
    This cell was tested sometime ago by Thunderheart Reviews, check Queen Battery QB26800 6800mAh 20A - the big guy!
    In the above review the cell delivered slightly less capacity, while the claimed manufacturer cut-off was 3V (I remember having checked the datasheet back then, and cut-off was specified at 3V if I'm not mistaken). Maybe if you read capacity @ 3V in your graphs, Mooch, your figure will be closer to that of Thunderheart Reviews.
    Thanks for the review. I suggested this to HKJ months ago but he refused due to battery holder bla bla bla.
    Very distinct positive pole geometry, no doubt. And let them overrate, phew! I am soo tired of rewrapper battery lies that it is quite nice to see ratings with deal to spare.

    Cheers
     
  3. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Avoided his review until I posted mine but was aware of it. Thanks!
    Yes, capacity to 3V would be about the same for both of us, which it should be. I rated them at 6800mAh though, their factory rating.
     
  4. Barkuti

    Barkuti Super Member ECF Veteran

    As you say there are some other new formats, 26700 is one of them. Two days ago I sent a couple LiitoKala Lii-40E 4000mAh LiFePO4 cells from here to HKJ, I am curious to see how these high capacity LiFePO4 cells perform. And almost inmediately after I found seller GlobalPower advertising what looks to be the real deal, i.e. the same cells but in their original wrap, here and there.
    We'll see how these perform. As far as I've seen, low C-rate LiFePO4 has always performed rather well, often easily surpassing its manufacturer specifications in power delivery (the Heter HTCFR18650-1800mAh-3.2V, for example).
     
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