Bike Battery Charger Circuit Diagram - Learning Electronics Bike Battery Charger This simple circuit allows a 12V battery pack to be charged via a bike generator. The generator is rated at 3W and with this voltage multiplier circuit provides about 200mA at Automatic 12v Portable Battery Charger Circuit using LM317 Circuit Diagram of Automatic Battery Charger This automatic battery charger circuit is mainly involves two sections – power supply section and load comparison section. The main supply voltage 230V, 50Hz is connected to the primary winding of the center tapped transformer to 3 Easy 48V Battery Charger Circuits Explained Simple 48V Automatic Battery Charger Circuit. Hi Sir, we have an e-bike with 48v Hello sir, pls I need an auto-cut off car battery charger circuit diagram to charge my 96volts/600amps battery bank for my inverter,pls my mail:eureka11@gmail, tnx alot! Reply. Car Battery Charger Circuit - Electronics Hub Car Battery Charger Circuit Working Principle: This is a simple car battery charger with indication. The battery is charged from a 230V, 50Hz AC mains supply. This AC voltage is rectified and filtered to obtain an unregulated DC voltage used to charge the battery through a relay.