How long does it take to fully charge a dead car battery by running the engine?
1 Answers
If you want to charge a dead battery using the engine, take a 12V60Ah battery as an example. The charging method adopts constant voltage and current limiting: charge at 14.8V constant voltage and 15A current limiting for 16 hours, followed by 3A constant current charging for 4 hours, totaling 20 hours. The required charging time is relatively long. Here are some related details: 1. Other charging methods: If the battery is dead, it is recommended to use a battery charger to fully charge it. Typically, a household car battery has a capacity of around 60Ah, requiring a charging current of one-tenth of the battery capacity, which is 6A. Charging at this current usually takes about 3-5 hours to fully charge. 2. Battery lifespan: Car batteries are relatively consumable parts. With each charge and discharge cycle, the battery's performance deteriorates. Under normal circumstances, with proper usage habits, a battery can last 3-4 years, or even longer. 3. Battery maintenance: (1) If the car is not used for an extended period, it is advisable to disconnect the negative terminal of the battery. This prevents the battery from activating its self-protection function to discharge, avoiding a deep discharge state, which could lead to permanent battery failure. (2) Additionally, to minimize power consumption, it is recommended not to use high-power electronic devices such as headlights or audio systems for extended periods when the engine is not running.
