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  • Tricky with IMR (LiMn) 3.7v cells

    posted by TorchAddict on 01/30/2011
    0

    Involvement:Expert (understands the inner workings) - Ownership:more than 1 month

    Pros:

    Fits all cell sizes from CR2 to 32670
    Charges LiFePO4 and Li-Ion*
    Inexpensive
    Cuts off charge to avoid overcharging
    Charges two cells at once (sort of)*
    So much nicer for large cell sizes than using magnets and wires or homemade carriers to charge them in.

    Cons:

    Does not work as well with low internal resistance 3.7V cells like AW IMR cells and Sony 26650VT cells, compared to traditional LiCo chem Li-Ion cells. When using IMR cells, the charge lights would instantly turn green if two cells were placed on the charger at the same time or if 650mA charge mode was selected. I'd have to charge one IMR at a time in 300mA mode. Even with only one cell, I'd have to "trick" this charger by placing a LiCo cell on it first and then switch it for an IMR cell to keep the LED from turning Green almost instantly.

    Bottomline:

    IMR (LiMn) and LiNiCoMn 3.7V cells are this charger's weakness. Aside from the special measures needed to be taken to charge those cells(described in the cons section of this review), this is a great universal Lithium cell charger. If you have LiFePO4 cells in 18650 size or A123 26650 cells or UltraFire 3.2V 32600 or 25500 cells, then this charger is the perfect cheap charger for them.

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