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MXJO Yellow 35A 2500mAh 18650 Bench Test Results...only a 20A battery, but a decent one

Discussion in 'Batteries and Chargers' started by Mooch, Sep 2, 2015.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Tested at 10A-25A constant current. This cell was purchased from IMRBatteries and donated for testing. To prevent any confusion with the eGo-type "batteries", I use the term "cell" here to refer to a single 18650, 26650, etc.


    Disclaimer
    The conclusions and recommendations I make based on these tests are only my personal opinion. Carefully research any battery you are considering using before purchasing.

    Testing batteries at their limits is dangerous and should never, ever, be attempted by anyone who has not thoroughly studied the dangers involved and how to minimize them. My safety precautions are the ones I have elected to take and you should not assume they will protect you if you attempt to do any testing. Do the research and create your own testing methods and safety precautions.

    image.jpg image.jpg image.jpg image.jpg


    Bottom Line
    In my opinion, this is a decent 20A continuous discharge current (CDR) cell with average capacity. Its performance is close to the LG HE4. I recommend not using it above 20A as it runs at a very high temperature at those current levels.


    Test Results
    image.jpg


    Comments
    • At 10A it reached about 2350mAh. This is good performance for a 2500mAh-rated cell.
    • At 15A the maximum temperature reached 71°C. This is too low for a cell operating at its CDR.
    • At 20A the maximum temperature reached 80°-83°C. This is near the high end of temperatures for 20A to be the CDR, but the same as the HE4.
    • At 25A the temperature rose to 93°C. This is way too hot to set the CDR at 25A.
    • Five additional cycles at 20A showed no signs of damage other than that which occurs when running a cell at its CDR. I am setting a CDR of 20A for this cell.
    • The capacity at 20A down to 3.2V was about 15% less than the Samsung 25R. The MXJO's capacity is about the same as the LG HE4 though, for both capacity and voltage under load, and the cell can, top, and tooling marks were very close in appearance to the HE4. I do not know which cell MXJO uses though.
    • To see how other cells have tested and how hard you can safely push them, check out the links in my signature.
     
    State O' Flux, KenD and Baditude like this.
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