Circuit 12 volt 7 amp batteries ideal for charging the battery is full, the indicator LED lights output voltage falls by399 diodes instead of 3 amps any fast diodes (uf5408) or 1n5407 available bdx53 transistor Charge Current Limiting as... Electronics Projects, 12V 7AH Battery Charging Circuit Charge Current Limiting "battery charger circuit, power electronic projects, " Date 2014/06/22