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Thread: Test/Review of Efest IMR18490 1100mAh (Red)

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

    Default Test/Review of Efest IMR18490 1100mAh (Red)

    Efest IMR18490 1100mAh (Red)

    Official specifications:
    • Nominal Voltage: 3.7v
    • Battery Model: 18490 Capacity: 1100mAh
    • Positive: Nipple Top
    • Cycle Life:500 Cycles
    • Weight: 45g
    • Dimensions: 48.89mm (L) x 18.19mm (D)

    The battery is a slightly short verions of a 18500 battery and because it is IMR it does not have protection.

    The rating of 1100mAh does fit very nicely with the measurements and the battery does also handle a 5A discharge current fine.

    My test is discharging the battery and it cannot continue to deliver full current.


    This cell works well at the currents I have tested.
    At the current time I can only rate them acceptable, because Efest is a new company, and the batteries is not from one of the big brands.

    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
    My website with battery, charger, usb reviews, comparisons & information: https://lygte-info.dk/
    Latest addition is multimeter reviews

  2. #2
    Flashaholic* psychbeat's Avatar
    Join Date
    Nov 2009
    SF norcal

    Default Test/Review of Efest IMR18490 1100mAh (Red)

    These seem to compare closely with he AW version.
    Thanks for the test -awesome as always!

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