MXJO Yellow 30A 2900mAh 18650 Bench Test Results...a preposterously overrated 10A/2700mAh battery

Discussion in 'Batteries and Chargers' started by Mooch, Oct 11, 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.

    image.jpeg image.jpeg image.jpeg image.jpeg


    Bottom Line
    This is an overrated and rewrapped cell which I am rating at 10A. When discharged at its 30A rating it instantly plunges to 3.1V and quickly drops from there. Its capacity is only 2700mAh. It's maximum vaping amps (MVA) rating is 10A. These MXJO's are identical in appearance to the LG MG1's I've tested but they don't perform quite as well as MG1's.

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


    Continuous-Current Test Results
    image.png


    Pulse-Current Test Results
    Pulse testing was not done since this is a poor performing LG MG1 rewrap and I don't recommend buying it as there are other better performing cells for the same price or less.


    Comments
    • At 10A continuous it reached about 2426mAh. This is very low for a 2900mAh cell but is average performance for a 2700mAh cell so I am rating it at 2700mAh.
    • At 15A continuous the temperature rose to 94°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. The voltage is already sagging a lot.
    • At 20A continuous the temperature only rose to 77°C but the voltage quickly collapses.
    • At 30A continuous the cell is useless, instantly dropping to 3.1V and quickly dropping from there. It is obviously not a 30A cell.
    • I am setting a CDR of 10A 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 10A 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//
     
    sonicbomb, KayP and MikeyConti like this.
  2. Barkuti

    Barkuti Senior Member ECF Veteran

    May 3, 2016
    Uuuh yeah! Another demeaningful piss poor rewrap.
    Take a look at this graph from HKJ's reviews:

    [​IMG]

    Compare the VTC5's 20A discharge curve to the 10A curve of the MXJOke reviewed here. No comments. :rolleyes:
    Cheers :rickroll:
     
    KayP and Mooch like this.

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