How long do I need to drive after the car battery is dead to recharge it?

[SanKira]

3-5 hours. Here are the relevant details: Engine charging: If you want to recharge a dead battery using the engine, take a 12V60Ah battery as an example. The charging method adopts constant voltage and limited current. Charge at 14.8V constant voltage and 15A limited current for 16 hours, then charge at 3A constant current for 4 hours, totaling 20 hours. The required charging time is relatively long. Charger charging: If the owner finds the battery dead, a more recommended method is to fully charge the battery using a charger. Generally, the battery capacity of a household car is around 60Ah, and the required charging current is one-tenth of the battery capacity, which is 6A. Charging at this current usually takes about 3-5 hours to fully charge.