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Bench Test Results: Keeppower 10A 1200mAh 18350...bit overrated, looks like YDL 18350D

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

    B1F1044B-DE1D-4F19-B790-A7CAAE22C4A8.jpeg D0145789-66F2-4091-BC2F-847503302646.jpeg 340DB58C-C47C-4749-B2D8-69AD8E3D7543.jpeg CE6FA079-A3F2-4F7B-B26B-B7AD8690F2CE.jpeg

    Bottom Line
    These Keeppowers look the same, and perform almost the same, as the good performing YDL 18350D. The average performance for these Keeppowers is not quite as good as the average performance of the 10A-rated YDL cells so I am giving this cell a 9A continuous current rating. They all run at about the same temperature. It’s the differences in voltage sag that affects their current rating.

    To extend cell life, minimize voltage sag, and increase your safety margin, I recommend staying at 7A-9A or under for these Keeppowers. That’s about 20W-27W per cell. This is a good performing 18350 but all 18350’s are a poor choice for anything above low power levels.

    The two cells I tested delivered 1062mAh and 1086mAh. This is decent consistency but they do not meet Keeppower’s 1200mAh rating. I am rating this cell at 1000mAh.

    Like all 18350’s I’ve tested the cell-to-cell performance consistency for these Keeppowers 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 were purchased by me for the purposes of testing.

    Discharge Graphs

    Ratings Graphic

    Performance Specs
    DC Internal Resistance = 41.0mOhms (milliohms) average for the two cells.
    Total energy delivered down to 3.2V at 10A continuous = 0.9Wh and 1.4Wh for the 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. NHXJer

    NHXJer Senior Member Verified Member ECF Veteran

    Aug 28, 2013
    United States
    Thanks Mooch.
    Looks like the Keeppower and Vapcell are the go-to 18350's
    And Aspire - if you can still find them.
    • Agree Agree x 2
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