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Bench Test Results: Yong De Li New Energy Co. 26650...good performer, rewrapped by others

Discussion in 'Batteries and Chargers' started by Mooch, Jan 20, 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.

    4AA1A2BB-1E50-48A4-A111-1D4FAF12A8C5.jpeg 4F5CE471-BD49-40FA-8B58-AC88A535B9DD.jpeg 505FABD7-F331-4914-8BF6-3B43BFF56C9E.jpeg 4CFB8ECD-F690-42D6-BEA8-86BDC00E4230.jpeg

    Bottom Line
    This is the good performing Yong De Li New Energy Company YDL 26650D. Aspire owns (partially or fully) this company and it supplies Aspire’s cells. This 26650 is rewrapped by other companies too.

    These cells cannot be directly purchased by vapers but I am testing them so I can compare their performance and appearance to what other companies wrap. If another company’s cell looks and performs the same as this one then, in my opinion, we can be pretty sure they are the same.

    The capacity for the two cells I tested was 4237mAh and 4264mAh at 860mA (0.2C) down to 2.5V. This is good consistency for a China manufactured cell and meets the 4200mAh minimum rating that YDL gives it.

    The “typical” capacity rating from YDL for this cell is 4300mAh so I guess that is why the rewrappers of this cell use that number but, like we saw with Aspire, that number is too high. I am rating this cell at 4200mAh.

    YDL gives this cell a 40A “max discharge currrent” rating but in my opinion that cannot be a continuous rating due to the extreme voltage sag and a max temperature of 88°C in my testing...too hot. I recommend staying below 30A and I am giving it a 30A rating.

    Continuous Current Discharge Graphs

    Ratings Graphic

    Performance Specs
    • DC Internal Resistance = 16.0mOhms*** (milliohms) average for the two cells.
    • Watt-hours (energy) delivered at 10A down to 3.2V = 12.7Wh
    • Watt-hours (energy) delivered at 20A down to 3.2V = 9.8Wh
    • Watt-hours (energy) delivered at 30A down to 3.2V = 5.6Wh
    • 2-sec puff count at 30W = 762
    • 2-sec puff count at 60W = 294
    • 2-sec puff count at 90W = 112
    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

    ***I have switched test jigs, resulting in slightly lower IR readings versus my previous setup. Add 1.6mOhms to this IR value in order to compare these cells to others tested previously.
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