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Bench Test Results: EHPRO Silver-Black 2600mAh 40A 18650...EHPRO says do not use with e-cigs!

Discussion in 'Batteries and Chargers' started by Mooch, Mar 4, 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.

    7935ADA1-C8E7-44F7-9737-C2BD8A1E707B.jpeg 3794EED8-3865-4FB8-8DF7-5017DD822CB5.jpeg E1FFDF5D-F364-4EF9-A1D4-154AB86E985E.jpeg CDFB5C48-588D-441C-8E84-8215554A53F7.jpeg


    Bottom Line
    EHPRO 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? 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 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 “40A MAX”. But if you go to the EHPRO web site it says it has a 32A continuous rating. This cell doesn’t even have the tiny “max continuous discharge” and “max pulse discharge” ratings on the wrap that the 2000mAh and 2200mAh 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 32A rating is exaggerated a bit and results in short cycle life too. This appears to be a VTC5A rewrap...for now. That is an expensive cell to rewrap and anyone purchasing this cell to get VTC5A’s should carefully examine and test the cell to make sure it’s still a VTC5A that’s being rewrapped.

    While Sony rates the VTC5A at 30A continuous that results in a shorter cycle life. This is why I rate the VTC5A at 25A, to give the VTC5A about the same cycle life as other cells you might be comparing it too. If we allowed other cells to get that hot their ratings would be higher too

    This EHPRO’s capacity rating of 2600mAh matches the “nominal” (typical) capacity rating of the VTC5A but the “rated” capacity (the number I use) of the VTC5A is 2500mAh.

    I am rating this EHPRO at 25A and 2500mAh for any non-vaping use.

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


    Continuous Current Discharge Graphs
    41CAB24E-AF6D-4096-A1D8-EBAD0E619E30.jpeg 3F0FDE7D-06D1-49C4-B43F-576EF35C8669.jpeg


    Ratings Graphic
    060ED71D-CF3A-4E18-9427-937AA893794D.jpeg


    EHPRO warnings against e-cigarette use
    2D5E8E14-4D33-44D6-A058-B6B4D8D02DAA.jpeg 8F809693-A636-4358-8E7E-B6BA898EB71C.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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