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MXJO Yellow 35A 2800mAh 18650 Bench Test Results...only a 20A battery but equals the 25R

Discussion in 'Batteries and Chargers' started by Mooch, Jul 27, 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 by a friend 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 selected 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
    This is a very good 20A continuous discharge current (CDR) cell, equaling the Samsung 25R. At 25A it gets very hot. This is not a 35A cell and, in my opinion, you should not run this cell above 20A.


    Test Results
    image.jpg


    Comments
    • At 10A the discharge almost reached 2800mAh, this is very good performance for a 2800mAh-rated cell.
    • At 20A the cell had a higher-than-average maximum temperature of 82°C, about the same as the Samsung 30Q and LG HG2.
    • The cell performed quite well at 20A, lasting a bit longer than a Samsung 25R but with very similar voltages under load.
    • At 25A the cell reached a max temperature of 97°C. This is a way too high a temperature for a cell to operate at and is very close to my safety limit of 100°C.
    • Discharges were not done at 30A or 35A due to the very high temperature seen during the 25A test.
    • An additional five cycles at 20A showed no signs of damage other than that expected from running a cell at its CDR for several cycles.
    • A second 10A discharge also showed only the changes in voltage and capacity normally expected after several cycles at the cell's rating.
    • I am setting a CDR of 20A for this cell. I think you will get decent cycle life due to the minimal damage shown at that current level. It is a very good 20A cell. But, in my opinion, you should not run this cell at above 20A.
    • This cell has a top shape very close to the 25R. The inkjet codes on the can are also similar to the 25R. But, it runs hotter than the 25R, and lasts longer, so I don't know if it's a rewrapped 25R or not. It certainly is a very good 20A cell, no matter which one it is.

    To see how other batteries have tested and how hard you can safely push any of the batteries I have tested, check out the links in my signature.
     
    • Like Like x 2
  2. Roccov

    Roccov Reviewer / Blogger Verified Member ECF Veteran

    Nov 22, 2012
    Philly
    Thanks for sharing your results sir. Enjoy the day!:2cool:
     
    • Like Like x 1
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