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Thread: Test/review of UltraFire TR18650 5000mAh (Blue) 2018

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

    Default Test/review of UltraFire TR18650 5000mAh (Blue) 2018

    UltraFire TR18650 5000mAh (Blue) 2018

    Official specifications:
    • No memory effect, recharge up to 1000 cycles
    • 100% brand new 18650 rechargeable batteries
    • 100% quality Japanese battery cells
    • 100% Q.C. of every battery
    • Capacity: 5000mAh
    • Voltage: 3.7 V
    • Chemistry: Li-ion

    With the above specifications this must be good batteries? Or maybe not!

    The wrapper is, as usual, wrong, there is no PCB in these batteries.

    The batteries can deliver about 2A and has a capacity of 1100mA


    I have tested this battery a few years ago and it has not improved with time, it is slightly worse.

    It is a bad battery, with wrong specifications. It is cheaper to buy good batteries!

    Notes and links

    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
    Last edited by HKJ; 11-13-2018 at 03:44 AM.
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  2. #2
    Join Date
    Jan 2008
    Boden, Sweden

    Default Re: Test/review of UltraFire TR18650 5000mAh (Blue) 2018

    Thanks for the test! This is very valuable for dissuading people buying cheap junk batteries.
    And the worst with this battery is not the strongly exaggerated performance specification but the lack of protection while claiming it has it!
    Last edited by Swedpat; 11-13-2018 at 03:18 AM.

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