DX  » Community » Reviews » UltraFire Protected 18650 3.7V "4000mAh" Rechargeable Li-ion Batteries (Pair)
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    • Overall Rating: 4
    • Price: 3
    • Quality: 4
    • Ease Of Use: 5
    • Usefulness: 5
    2 DXPoints
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    Good but capacity overrated

    posted by Schneizel on 09/17/2011 Certified Owner

    Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month

    Pros:
    Protection circuitry prevents over-discharge and over-charge. Length is pretty close to 65mm. Never actually measured but it fits in my X2000 torch. Some complain that protected 18650s don't fit in this torch.
    Cons:
    Measured at 1.0A discharge, charged to 4.05V, capacity read off the charger was 1684 and 1724. So the rated capacity of 4000mAh...
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