XXX 20A 3000mAh Bench Test Results...an accurately rated battery, looks like 30Q

Discussion in 'Batteries and Chargers' started by Mooch, Nov 1, 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 image.jpeg


    Bottom Line
    This cell seems to be the replacement for the dangerously overrated 40A 3100mAh rewrap of the Samsung 30Q that XXX Batteries was selling earlier.

    This is a rewrapped but accurately rated 20A 3000mAh cell. It also has "40A" on it with nothing telling you what that is. The web site says it's the "Max. pulse current" rating but without knowing more about the pulses and how they set the rating the number is useless.

    My maximum vaping amps (MVA) rating is 25A. It appearance is identical to the Samsung 30Q but it performed a tiny bit better than the 30Q's I've tested previously. If you are vaping with this cell at 35A or so, and there is a mod malfunction or accidental button press, it can get hot enough to possibly vent. But this is also true for the Samsung 30Q or any cell that rewraps it.

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


    Continuous-Current Test Results
    Only 10A and 20A continuous tests were done to confirm that it is a Samsung 30Q
    image.png


    Samsung 30Q Test Results
    Samsung 30Q 20A 3000mAh 18650 Bench Retest Results...a great 20A/3000mAh battery!


    Comments
    • At 10A continuous it reached about 2800mAh. This is good performance for a 3000mAh cell at 10A so I am rating it at 3000mAh.
    • At 20A continuous the temperature rose to 81°C. This is just above the average temperature of a cell operating at its continuous discharge rating (CDR), but within limits, and is an indication that we are operating at its true rating.
    • I am setting a CDR of 20A for this cell. While operating any cell near its rated maximum current level causes damage to the cell, I would expect good cycle life from this cell at 20A 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//
     
    MikeyConti, Kemosabe and sonicbomb like this.
  2. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser

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