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Bench Test Results: Keeppower 10A 1200mAh 18350...above average 9A battery, only 1000mAh though

Discussion in 'Batteries and Chargers' started by Mooch, Jun 21, 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.

    49ACFC80-90C5-4268-BEAC-206B422071FB.jpeg 31A2FDCD-163D-4E5B-9A13-4330910A2FB0.jpeg ADB1C589-11AF-4074-9772-E383FF2AAE64.jpeg BBABBEC0-E300-48BF-B214-AF31CA871EB7.jpeg


    Bottom Line
    While this cell has a close to accurate 10A continuous current rating on the wrap it is in very tiny print and a useless 15A “pulse” rating is also used. This is confusing, unnecessary, and I would like to see this type of rating stopped.

    It is an above average performer but a bit worse than the Vapcell and Aspire cells. The two Keeppowers I tested delivered 1040mAh and 1042mAh at 0.2A down to 2.5V. This is quite a bit below their 1200mAh rating.

    I am estimating this Keeppower’s ratings at 9A and 1000mAh. Current ratings for high internal resistance cells like these are a combination of the temperature the cell runs at and how badly the voltage sags, i.e., its Wh specs.

    The performance of any 18350 really suffers at higher current levels due to their very high internal resistance, leading to huge voltage sag. I recommend staying under their continuous current rating. This results in much more efficient operation and much longer vaping time.

    This is the last in a group of seven 18350’s I am testing and I will be posting a shootout between all of them after the individual test reports are posted. The top three performers will then be identified.

    Two cells were purchased for the purposes of testing by me.


    Continuous Current Discharge Graphs
    CAEB4F00-A88F-4581-B0A9-3EBC26B73F4A.jpeg


    Ratings Graphic
    79B5C9C1-E8D6-403D-BC3B-E349FE696316.jpeg


    Performance Specs
    - DC Internal Resistance = 41.0mOhms (milliohms) average for the two cells.
    - Total energy delivered down to 3.2V at 10A continuous = 2.2Wh (Watt-hours) average
    - Total energy delivered down to 3.2V at 20A continuous = 1.2Wh (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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