MXJO Yellow 22A 4200mAh 26650 Bench Test Results...accurately rated!

Discussion in 'Batteries and Chargers' started by Mooch, Oct 18, 2016.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    #8 in the MXJO series, last one...

    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 cell has an accurate current rating of 22A and a higher-than-rated capacity of 4300mAh. This cell is a good performer and should fit in most devices due to its shorter length. The length of the two cells I tested was 66.0mm and 66.1mm. It's maximum vaping amps (MVA) rating is 30A due to the large voltage sag and high temperature at that level.

    The 26650 ratings table has been updated to include this cell.


    Continuous-Current Test Results
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    Pulse-Current Test Results
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    Comments
    • At 10A continuous it reached 4231mAh. This is a typical "nominal" capacity for a 4200mAh cell at 10A but I am rating it at 4300mAh for consistency between all my tests.
    • At 15A continuous the temperature rose to 60°C. This is way below the average temperature of a cell operating at its continuous discharge rating (CDR) and is an indication that we aren't near its true rating.
    • At 20A continuous the temperature rose to 73°C. This is a few degrees below the average temperature of a cell operating at its CDR and is an indication that we are still below its true rating.
    • At 25A continuous the temperature rose to 86°C. This is above the average temperature of a cell operating at its CDR and is an indication that we are above its true rating.
    • At 30A continuous the temperature rose to 96°C. This is way above the average temperature of a cell operating at its CDR, near my 100°C safety cutoff, and is an indication that we are significantly above its true rating. The voltage is sagging considerably.
    • I am setting a CDR of 22A 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 22A 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
    https://www.e-cigarette-forum.com/f...afety-grades-and-pulse-performance-data.7566/
    https://www.e-cigarette-forum.com/f...des-picking-a-safe-battery-to-vape-with.7447/
    https://www.e-cigarette-forum.com/f...fety-grades-and-pulse-performance-data.7554//
     

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