Charging batteries in parallel

Discussion in 'General Electronics Chat' started by sportsfan27, Apr 19, 2009.

  1. sportsfan27

    Thread Starter Active Member

    Jan 29, 2009
    I've got a question about charging batteries in parallel. I know that if I wanted to charge a 1000mAh battery at .1C, I'd have to charge it with 100mA. However, suppose I had two 1000mAh batteries that I wanted to charge at .1C. What would I have to do to do this? Thanks for any help.
  2. Audioguru


    Dec 20, 2007
    I assume you are talking about Ni-MH battery cells.
    They are all a little different unless they are matched. Then when they are charged in parallel, one will charge more and one will charge less. It will get worse for each discharge and recharge unless you allow the strongest one to over-charge. Battery manufacturers do not recommend over-charging.