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Bench Test Results: EHPRO Pink-Black 2000mAh 35A 18650...a poor performing 20A battery

Discussion in 'Batteries and Chargers' started by Mooch, Mar 2, 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.

    585A9EAE-DBAC-4167-BDE6-9604891EC30E.jpeg A6B50822-B3DD-4C66-85CA-575197D36694.jpeg EE4CED7B-69A4-4924-BABC-1FCBA5D6AD3E.jpeg 2DFAF544-47AF-4ADD-971C-872B69EC81B1.jpeg

    Bottom Line
    This EHPRO doesn’t match any Samsung, Sony, LG, or Panasonic/Sanyo cell I have. I do not know if it is a China-manufactured cell.

    The EHPRO Facebook page says it’s a 35A cell and the wrap has large letters that rate this cell at 35A “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 20A continuous and 35A “max pulse discharge”. This 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.

    Why is the lettering for the continuous rating so small but the 35A “max” rating so large? Why is this only referred to as a 35A cell on their Facebook page? Things that make you go hmm...

    This is a poor performing cell with a lot of voltage sag. The Samsung 20R, having the same 2000mAh capacity rating as this EHPRO, ran almost twice as long at 20A down to 3.2V. I am giving this EHPRO cell an estimated rating of 20A and 2000mAh.

    Watt-hour and internal resistance measurements were not done as this is a poor performing, overrated cell. The inexpensive Samsung 25R runs for more than twice as long at 20A, runs several degrees cooler, is widely available, and performs a lot better too.

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

    Continuous Current Discharge Graph

    Ratings Graphic

    To see how other cells have tested check out this link:
    • Like Like x 7
  2. stols001

    stols001 Mistress of the Dark Nicotinic Arts Verified Member

    Supporting member
    May 30, 2017
    Tucson, AZ
    ;Thanks for the testing, Mooch! :)

    • Like Like x 1

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