MXJO Yellow/Silver 35A 2600mAh 18650 Test Results...a dangerously overrated 19A/2500mAh battery

Discussion in 'Batteries and Chargers' started by Mooch, Oct 10, 2016.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    These cells were purchased with funds donated by the vaping community for the purposes of testing. Thank you! To prevent any confusion with the eGo-type "batteries", I use the term "cell" here to refer to a single 18350, 18650, 26650, etc.

    While the test results are hard data, the conclusions and recommendations I make based on these tests are only my personal opinion based on my criteria for setting a rating. Carefully research any cell you are considering using before purchasing.

    Testing cells 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.

    If the cell has only one current rating number on it, or if it says "max discharging current" then I have to assume that the company is stating that the cell can be discharged at that current level in any way, including continuously.

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    Bottom Line
    This is an overrated and rewrapped cell which I am rating at 19A. When discharged at its 35A rating its temperature rose to 112°C, hot enough to possibly vent if there was a mod malfunction or accidental button press. Its capacity is 2500mAh. It's maximum vaping amps (MVA) rating is 25A.

    It is identical in appearance to the LG HE2 but it seems to be a lower grade than the HE2's I tested. The internal resistance of these MXJO's is higher and this causes the voltage sag to be greater.

    The 18650 ratings table has been updated to include this cell.


    Continuous-Current Test Results
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    These MXJO's compared to the HE2
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    Pulse-Current Test Results
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    Comments
    • At 10A continuous it reached about 2350mAh. This is low for a 2600mAh cell but is average performance for a 2500mAh cell so I am rating it at 2500mAh.
    • At 15A continuous the temperature rose to 72°C. This is below the average temperature of a cell operating at its continuous discharge rating (CDR).
    • At 20A continuous the temperature rose to 83°C. This is a few degrees above the average temperature of a cell operating at its CDR and is an indication that we are operating just above its true rating.
    • At 25A continuous the temperature rose to 96°C. This is way above the average temperature of a cell operating at its CDR and is an indication that we are operating above its true rating.
    • At 30A continuous the temperature rose to 105°C. This temperature is ridiculously high and the voltage is sagging a lot.
    • At 35A continuous the temperature rose to 112°C. This temperature is ridiculously high and clearly indicates this is not a 35A cell. This is 2°C above my threshold for declaring 35A as a dangerous rating. It only delivered about 60mAh down to 3.2V.
    • I am setting a CDR of 19A for this cell. While operating any cell near its rated maximum current level causes damage to the cell, I would expect decent cycle life from this cell at 19A continuous.
    To see how other cells have tested and how hard you can safely push them, check out these links:
    List of Battery Tests | E-Cigarette Forum
     
    MikeyConti, KenD and sonicbomb like this.
  2. Bratac

    Bratac New Member

    Oct 18, 2016
    Does this go for the MXJO's 35A 3000mah?
     
  3. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    No, this is the 35A, 2600mAh MXJO.
     

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