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Nitecore 30A 2100mAh 18650 Bench Test Results...useless 30A rating, only 22A

Discussion in 'Batteries and Chargers' started by Mooch, May 11, 2017.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    To prevent any confusion with the eGo-type "batteries", I use the term "cell" here to refer to a single 18350, 18650, 20700/21700, 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" 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.

    IMG_5265.JPG IMG_5266.JPG IMG_5267.JPG IMG_5268.JPG


    Bottom Line
    This Nitecore is a 22A rewrapped cell with a useless pulse rating (see the Comments section).

    While this cell has a 20A continuous rating in micro print on the wrap it has a useless 30A "max pulse discharge" rating on the wrap too. It also features "30A" in a huge font which many people will use as the cell's rating when shopping or when a vendor displays it on their web site. For these reasons I feel the large "30A" rating, or any "pulse" or "max" rating, is misleading and shouldn't be used.

    The wrap is not the standard heat shrink plastic. It is self-adhesive and appears to be similar to Mylar. I do not know how durable it is compared to the wraps being used now by other companies.

    This cell says "IMR18650" on the wrap but it does not use IMR chemistry. It uses one of the INR chemistries.

    I am rating this Nitecore at 22A and 2100mAh. Its maximum vaping amps (MVA) rating is 30A, limited by temperature. It appears to be a Samsung rewrap and might just be 2000mAh cells that test well for capacity. Its performance is similar to the 20R but its appearance isn't a perfect match to the 20R's I have.

    The two cells that were tested were purchased by me from IMRBatteries.


    Continuous-Current Test Results
    IMG_5269.PNG


    Pulse-Current Test Results
    IMG_5270.PNG IMG_5271.PNG


    Always Remember
    ⁃ There is no 18650 with a factory/manufacturer rating over 30A continuous.
    - There is no 3000mAh 18650 that can have a rating over 20A continuous.
    ⁃ There is no 3100mAh-3600mAh 18650 that can have a rating over 10A continuous.
    ⁃ There is no 18650 available to vapers that has a capacity rating over 3600mAh.


    Comments
    • At 10A continuous this cell delivered 1925mAh. This is just under average performance for a 2100mAh rated cell so I am rating it at 2100mAh. It is also average performance for a good 2000mAh cell but I will default to Nitecore's capacity rating since I can't verify which cell they are rewrapping.
    • Pulse ratings are utterly and completely useless unless we know some things about how the ratings were set. There are no standards for a pulse rating. Without knowing the length of the pulse, the time between pulses, and the criteria used to set the rating (temperature? run time? voltage sag? a combination of these?) we can't compare one battery's pulse rating against another's. They're useless.
    • These "pulse" ratings can be dangerously high. While you might normally be able to vape at that high a level without too much risk, since the current is pulsed, these ratings don't take our safety into account in case of a mod malfunction or accidental button press. This can cause the battery to be discharged continuously, possibly causing it to vent (most likely not go into thermal runaway and burst though).
    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
     
    • Like Like x 3
  2. Shawn Hoefer

    Shawn Hoefer Vaping Master Verified Member ECF Veteran

    Supporting member
    Jan 21, 2015
    Arkansas Ozarks
    Thanks, Mooch!

    Sent from my SAMSUNG-SM-N910A using Tapatalk
     
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