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Bench Test Results: EHPRO Red-Black 2200mAh 40A 18650...preposterously overrated, DO NOT BUY

Discussion in 'Batteries and Chargers' started by Mooch, Mar 3, 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.

    8C83112B-6622-4912-ACD9-53F822CB6126.jpeg 91A356F1-B515-412E-9245-BCE755DBEBE8.jpeg FA2E1193-9735-4FB4-BCC2-ADF642476FA6.jpeg 28FC6007-CCE4-4066-94A3-2196A1E3E342.jpeg


    Bottom Line
    This is one of the most overrated cells I have ever tested. Do not buy it.

    The EHPRO Facebook page says it’s a 40A cell and the wrap has large letters that rate this cell at 40A “max”. The EHPRO web site does not have this cell on it.

    On the wrap, in the tiniest lettering I’ve ever seen on a cell, it says it’s rated 25A continuous and 40A “max pulse discharge”. This cell only delivered 56mAh (yes, only fifty-six) at 25A continuous down to 3.2V.

    The 40A 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. Pulsing this cell at 40A would cause its voltage to instantly collapse anyway.

    This is a disasterously poor performing cell. I am giving this EHPRO cell an estimated rating of 5A and unknown capacity as it’s not worth my time testing it further. Watt-hour and internal resistance measurements were not done due to its Do Not Buy recommendation.

    Two cells were donated for the purposes of testing by EHPRO (Shenzhen EHPRO Battery Technology Co., LTD |). Thank you!


    Continuous Current Discharge Graph
    E392B62F-9A5B-4479-A0A7-04FB050152EA.jpeg


    Ratings Graphic
    2B314B10-1E8D-4A3B-9199-2AEA25487FE7.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. untar

    untar Ultra Member

    Feb 7, 2018
    Germany
    :blink:...
     
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  3. Rossum

    Rossum Surly Curmudgeon Verified Member ECF Veteran

    Supporting member
    Dec 14, 2013
    NE FL
    They have plenty more preposterously rated cells on their site, e.g. a 3000 mAh 60A 18650. :rolleyes:
     
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  4. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser
    [​IMG]
     
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  5. Rossum

    Rossum Surly Curmudgeon Verified Member ECF Veteran

    Supporting member
    Dec 14, 2013
    NE FL
    • Like Like x 2
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