Results 1 to 4 of 4

Thread: Test/review of Efest IMR14500 650mAh (Purple) 2017

  1. #1
    HKJ's Avatar
    Join Date
    Mar 2008
    Copenhagen, Denmark

    Default Test/review of Efest IMR14500 650mAh (Purple) 2017

    Efest IMR14500 650mAh (Purple) 2017

    Official specifications:
    • Capacity: 650mAh
    • Charging Voltage: 4.2v
    • Maximum Discharge Current: 6.5A
    • Maximum Pulse Current: 9.75A
    • Maximum Charge Current: 650mA (1C)
    • Recommended Discharge Termination: 2.75v

    14500, i.e. AA sized LiIon batteries from Efest, rated for good capacity and high current.

    The discharge curves tracks kust about prefectly and the batteries can deliver nearly 7A before capacity starts to drop. This looks good.

    Temperature also looks fine at 7A


    Performance looks very good on these cell, both capacity and current handling is good.

    Notes and links

    The batteries was supplied by Efest for 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
    Comparison to other LiIon batteries
    My website with battery, charger, usb reviews, comparisons & information:
    Latest addition is multimeter reviews

  2. #2
    Join Date
    Nov 2013
    Idaho, USA

    Default Re: Test/review of Efest IMR14500 650mAh (Purple) 2017

    It's good to see that Efest has printed a realistic capacity and discharge current on these batteries. I hope they continue with this trend.

  3. #3

    Default Re: Test/review of Efest IMR14500 650mAh (Purple) 2017

    The question is, who makes these cells, and are they initially designed for such a large currents?

    Remember Efest selling relabeled NCR18650BE cells as high current ones, when these were not such current able at all?

  4. #4
    Join Date
    Mar 2017
    Long Island NY

    Default Re: Test/review of Efest IMR14500 650mAh (Purple) 2017

    These are great cells. The best 14500 that I have tried.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts