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Bench Test Results: EHPRO/Bootes Bronze-Black 3500mAh 30A 18650...just 10A 3300mAh, DO NOT BUY

Discussion in 'Batteries and Chargers' started by Mooch, Mar 11, 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.

    E55D3B7E-95C4-4962-A5A6-C5CC1ADECFFB.jpeg C4BF66A3-4A5D-4ADC-A39E-4EF65DDF5256.jpeg 350BD880-18FB-4339-A80F-95CC29CD8F6B.jpeg 666E9E68-0C5E-4AB6-BD8D-9E8ADC033E24.jpeg


    Bottom Line
    EHPRO/Bootes (not the EHPRO e-cig company) markets this cell to vapers but their web site clearly states it’s not meant for use with e-cigarettes and that it is a serious misuse of the cell. We’ve seen retail vendors do this, it’s just a standard liability statement, but when the battery wrapping company does this with their own cells then is it done at our expense?

    What should we do when a company is willing to sell us something, pocket the profits, and then say not to use what we bought? If you didn’t buy direct from their web site you’d never know they say not to use with e-cigs. Just something to consider. This is different than what Sony and LG do as they do not market to vapers and they actively try to keep us from using their cells.

    Since EHPRO/Bootes does not want anyone to use this cell with any vaping device I am giving it a Do Not Buy recommendation.

    There is no rating on this cell other than “30A MAX”. But if you go to the EHPRO/Bootes web site it says it has a 20A continuous rating. This cell doesn’t even have the tiny “max continuous discharge” and “max pulse discharge” ratings on the wrap that some of the other EHPRO/Bootes cells have.

    No customer should have to go on a quest to hunt down the continuous rating of a cell they are using. Any “max”, “pulse”, or “max pulse” rating is useless as we don’t know the pulse length, time between pulses, and the criteria they used to set the rating (temperature? voltage sag? cycle life? A combination of those or other things?). We’re not able to compare this cell’s pulse rating to any other’s.

    Unfortunately, the 30A “max” rating is preposterous and the capacity is exaggerated too. At 30A the voltage instantly dropped to about 3.10V. This cell appears and performs identically to the 10A 3300mAh Sanyo NCR18650GA.

    I am giving this EHPRO/Bootes cell estimated ratings of 10A and 3300mAh for any non-vaping use.

    Two cells were donated for the purposes of testing by EHPRO/Bootes (http://www.ehpropower.com). Thank you!


    Continuous Current Discharge Graph
    824B1566-0EF1-4A90-B83A-AA2F4A62AACD.jpeg


    Ratings Graphic
    F6485B88-273C-4114-96C2-04E13788AE3D.jpeg


    EHPRO warnings against e-cigarette use
    C73A6A55-42B7-4F66-BD84-6EF2526C668D.jpeg F19B13BF-B8D0-4C1F-AF3E-75DD1E1E5772.jpeg


    To see how other cells have tested check out this link: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/
     
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  2. stols001

    stols001 Mistress of the Dark Nicotinic Arts Verified Member ECF Veteran

    Supporting member
    May 30, 2017
    Tucson, AZ
    Thanks for testing and keeping us informed and up to date, Mooch :)

    Anna
     
    • Like Like x 1
    • Agree Agree x 1
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