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Thread: Test/Review of A123 18650 1100mAh (Yellow)

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

    Default Test/Review of A123 18650 1100mAh (Yellow)

    A123 18650 1100mAh (Yellow)

    This is a battery that can deliver very high amount of power!

    Official specifications:
    • Nominal Capacity & Voltage: 1.1Ah, 3.3v
    • Recommended standard charge method: 1.5A to 3.6v CCCV, 45min
    • Recommended fast charge current: 5A to 3.6v CCCV, 15min
    • Max continuous discharge: 30A
    • Pulse discharge at 10sec: 65A
    • Cycle life at 10C discharge, 100% DOD: Over 1,000 cycles
    • Recommended charge/cutoff voltage: 3.5v to 2v
    • Operating temp: -30 ~ +60degC
    • Cell Weight: 39g

    This battery has a lower voltage than the usual LiCoO2 batteries and also much lower capacity.

    There is not much capacity, but the capacity is available at very high currents.

    The battery is able to deliver 30A, but only for two minutes!

    The battery has no protection and I discharged it before I was finished with this test.

    I only uses a 1A charger current, the battery can be fast charged with a 4A current.


    This battery uses a "safe" chemistry, but this does not make the battery completely safe due to the high currents it can deliver.
    This is a very interesting battery for some applications, but due to the low voltage it is not really good for flashlights (leds need a lower Vf) and who would want a small super bright light that only works for two minutes (This is probably the wrong place to say that)?
    This battery can only rate a as very good.

    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
    My website with battery, charger, usb reviews, comparisons & information:
    Latest addition is multimeter reviews

  2. #2
    Flashaholic* bshanahan14rulz's Avatar
    Join Date
    Jan 2009

    Default Re: Test/Review of A123 18650 1100mAh (Yellow)

    These would be great for high performance switch-mode buck-boost or boost drivers. However, for only bucking or linears, the low nominal voltage makes it less suitable for our needs.

    Great post, as always, HKJ. Thanks!

  3. #3

    Default Re: Test/Review of A123 18650 1100mAh (Yellow)

    I find your conclusions odd. This technology is designed for high current applications, not flashlights.
    They are for electric cars, RC and so on. Superior lifespan and high discharge capabilities are worth lower voltage and capacity.

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