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  • perfectly charge 10440 & 14500

    posted by scalex on 03/21/2009
    2 0

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

    Pros:

    I received it few weeks ago, and today (22.03.2009) I tested. It seems that has been fixed over-charging problem with the right slot. not necessary to add 2 x 4V3 zener diodes to limit charging over 4.2V! Now is working by default!

    1st: 2 x 10440 Li-Ion accu partially charged (at 3.7 and 3.8V). I measured charging current and is 27-30mA on booth slots. When charging leds are RED. After 1.5H, booth leds become GREEN. I measured voltage and booth 10440! Now, have 4.2V! Super ok!

    2nd: 2 x 14500 Li-Ion accu partially charged (at 3.7V booth). I measured charging current and is 65-68mA on booth slots. When charging leds are RED. After 3H, booth leds become GREEN. I measured again voltage and booth we have 4.2V! Super ok!

    Cons:

    Not really a cons. I observed that metal spangles which holds battery are to flexible. In some circumstances may be ok, but in general, not! They should be a little sturdy/rigid! When you are inserting cells, spangles can be deformed!

    OtherThoughts:

    They rated it at 500mA. It isn't. In my case is not a cons. I ordered for my 10440 unprotected cells. It should be charged at lower rates (less than 200mA), so 30mA is ideal. No matter that the charging time will be longer. This lower current is ideal!

    Bottomline:

    Buy it! Now, is ok!

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