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Samsung 25R (6M Variant) 18650 Bench Test Results...25R5 is slightly better

Discussion in 'Batteries and Chargers' started by Mooch, Apr 24, 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_5149.JPG IMG_5150.JPG IMG_5151.JPG IMG_5152.JPG


    Bottom Line
    This 25R6M is a true 20A cell that performs well but not quite as well as the 25R5 variant. The "M" indicates that this cell was made in their Malaysia factory.

    I don't know if all of the 25R6M's are like this but both of the ones I tested performed the same. They have the same capacity as the 25R5 but run at a lower voltage, i.e., they don't hit quite as hard. The 25R6M does run a bit cooler than the 25R5 though, earning the 25R6M a higher MVA rating.

    I am rating the 25R6M at 20A and 2500mAh. Its maximum vaping amps (MVA) rating is 30A, limited by temperature.

    My thanks to IMRBatteries for donating the two cells for testing (www.imrbatteries.com)!


    Continuous-Current Test Results
    IMG_5153.jpg


    Comparison to the Samsung 25R5
    IMG_5154.PNG IMG_5155.PNG IMG_5156.PNG


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

    Comments
    • At 10A continuous this cell delivered about 2400mAh. This great performance for a 2500mAh cell so I am rating it at 2500mAh.
    • Its temperature of 73°C at 20A continuous is below the average for cells being operated at their rating so I am rating this cell at 20A.
    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
     
    Lady M, MikeyConti, hazozita and 3 others like this.
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