Tiny 10mAh Li-polymer battery. What to charge it with?

Discussion in 'The Projects Forum' started by kender, Sep 1, 2012.

  1. kender

    Thread Starter Senior Member

    Jan 17, 2007
    263
    0
    Folks,

    There are extremely small Li-polymer batteries with 10mAh capacity. Like this one:

    [​IMG] (source)

    I’d like to charge a battery like this with a CCCV profile. The CC would be 0.7C, which is 7mA. So, I went looking for linear charger ICs (e.g. MAX1555). Some of them have an adjustable charge current, but, the lower limit doesn’t extend down to 7mA range. I wonder what folks are using for charging these batteries?

    Any suggestion, insight or reference is really appreciated!

    - Nick
     
  2. DickCappels

    Moderator

    Aug 21, 2008
    2,656
    632
    It depends on how well you want to charge it. I think you can safely charge it at 1/10 capacity; that is just use a resistor to charge it at 1 ma or maybe a little less. The more sophisticated methods can get you a faster charge and more energy stored n the capacitor than this simple approach.
     
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