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Thread: Test/Review of Efest IMR26650 4200mAh (Purple) 2016

  1. #1
    HKJ's Avatar
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    Default Test/Review of Efest IMR26650 4200mAh (Purple) 2016

    Efest IMR26650 4200mAh (Purple) 2016



    Official specifications:
    • Rated capacity: 4200mAh
    • Rated voltage: 3.7V
    • Max continuous discharge current: 40A
    • Pulse discharge current: 60A
    • Lifetime: 500 cycles to 60%




    A 26650 cell with current rating.











    The discharge curves tracks fairly well and capacity is nearly constant with load.







    The battery gets very warm at 30A.















    Conclusion

    The battery has good performance, but I doubt the 40A rating.



    Notes and links

    The batteries was supplied by Efest for a review.

    How is the test done and how to read the charts
    How is a protected LiIon battery constructed
    More about button top and flat top batteries
    Compare to 18650 and other batteries
    My website with battery and charger information: lygte-info.
    More than 1000 reviews of batteries, charges and other stuff.
    Compare 18650 LiIon batteries or smaller (RCR123, 16340, 14500, 10450) LiIon batteries.

  2. #2
    Flashaholic*
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    Default Re: Test/Review of Efest IMR26650 4200mAh (Purple) 2016

    Thank you HKJ, looks to be a good battery. It is a shame they had to mark the battery, for all to see, '40A'.

  3. #3

    Default Re: Test/Review of Efest IMR26650 4200mAh (Purple) 2016

    It is not even good for 20A.

  4. #4
    Flashaholic* candle lamp's Avatar
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    Default Re: Test/Review of Efest IMR26650 4200mAh (Purple) 2016

    Thanks a lot for your excellent review. HKJ!

  5. #5

    Default Re: Test/Review of Efest IMR26650 4200mAh (Purple) 2016

    What current did they use to rate this battery?

    For those who don't need or want anything above 5Amps, like long running moderately driven lights, for example, this seems a good choice.

  6. #6

    Default Re: Test/Review of Efest IMR26650 4200mAh (Purple) 2016

    Does anyone know if a magnet will stick to the top of this cell? Also is this the same as the 4200ma cell that now comes in green?
    In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
    FS: Everyday Carry Lights Upgrades for Maglite.

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