12V BATTERY CHARGER CIRCUIT

This high-performance charger quickly charges gelled lead-acid batteries, and turns off at full charge. At first, the charge current is held at 2 A, but as battery voltage rises, current decreases. When current falls to 150 rnA, the charger automatically switches to a lower float voltage to keep from overcharging. When you hit full charge, transistor Qllights the LED to indicate that status.

12V BATTERY CHARGER CIRCUIT