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Bench Test Results: YDL 15A 1100mAh 18350...10A rated, rewrapped by others

Discussion in 'Batteries and Chargers' started by Mooch, Aug 17, 2019.

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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.

    F880BB02-C9CB-491D-B35C-312F0BDE0D13.jpeg B023DC35-9EA3-48D1-A2B3-C7478E8CE1DE.jpeg FAF1B619-CF39-47FC-B8CF-9D366A2F61DA.jpeg FC38DE63-8B25-44F6-8B96-89403AA9B0E3.jpeg

    Bottom Line
    I’m testing this cell because I believe it’s the one rewrapped by other companies. This is a good performing 18350.

    The Yong De Li New Energy Co. (YDL) rates this cell at 15A “max. discharge current” in the datasheet. But at 15A continuous it only delivers about 60mAh down to 3.2V (a common cutoff voltage for vapers). The voltage sag is huge if you go above about 10A with this cell.

    I am giving this cell a 10A continuous current rating. To extend cell life, minimize voltage sag, and increase your safety margin, I recommend staying at 7A-10A or under per cell. That’s about 20W-30W per cell. This is one of the best performing 18350’s but they are a poor choice for anything above low power levels.

    The two cells I tested delivered 1101mAh and 1121mAh. I am rating this cell at 1100mAh.

    Like all 18350’s I’ve tested the cell-to-cell performance consistency for this YDL cell is not good. There’s not a huge difference between cells but you might notice it if you have one of the better ones and one of the worst ones.

    Two cells were donated for the purposes of testing by a source that prefers to remain anonymous. Thank you!

    Discharge Graphs

    Ratings Graphic

    Performance Specs
    DC Internal Resistance = 39.9mOhms (milliohms) average for the two cells.
    Total energy delivered down to 3.2V at 5A continuous = 2.4Wh and 2.6Wh for two cells.
    Total energy delivered down to 3.2V at 10A continuous = 1.4Wh and 1.6Wh for two cells.

    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. Susaz

    Susaz Vaping Master ECF Veteran

  3. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    • Like Like x 1
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