In general, vehicle battery charging system has three forms.
Constant current charge: The battery voltage gradually rises by charging with setting a constant current. If charging current and time are not managed correctly, the battery is over-charged, therefore charging should be stopped after confirming the completion of charging.
General charge: Charging the battery for a long time with low current
Quick charge: Charging the battery for a short time with high current
Constant voltage charge: The battery charge current is gradually reduced by charging with setting a constant voltage.
Constant current-Constant voltage charge: Charging with constant current and voltage to protect the battery damage
Initial Stage: Charging with constant current
Last Stage: Charging with constant voltage
Refer to the instruction manual provided by the battery charger equipment manufacturers for detailed charging procedures and precautions.