Lead Acid Battery Charger

Discussion in 'General Electronics Chat' started by happyfpga, Oct 16, 2008.

  1. happyfpga

    Thread Starter New Member

    Oct 4, 2008
    Hi, I have few knowledge about battery.

    I need to build a charger for 12V lead acid battery. Do I have to use a constant current circuit? Which part determins the charging current, battery or charger? I have a mature circuit labeled up to 4A charging current. The battery needs 0.4A charging current. Can they work together?

  2. Externet

    AAC Fanatic!

    Nov 29, 2005
    No, you have to charge with constant voltage. Depending manufacturer of the battery, can be around 13.5V to 14V
    The current is determined by the battery charge state and size.
    A charger capable of up to 4 Amperes can be used to charge at a rate of 0.4 Amperes.