How Long Does It Take to Charge a Car After the Battery Dies?

[StAugust]

When a car battery is dead, the car engine needs to maintain a speed of over 2000 RPM, and the car must be driven for at least 4 hours to fully recharge the battery. Here are the specific details about car batteries: 1. Function: The battery stores electrical energy. Without it, the car cannot operate normally. 2. Charging while driving: Typically, household car batteries are 12V, with a no-load voltage around 13V and a load voltage not lower than 11V. If the voltage drops below this level, it may cause difficulty in starting the car. The battery can be charged by the alternator while the car is running. If the car is parked for an extended period, the battery may lose its charge, making it difficult to start the car. Therefore, during long-term parking, it is recommended to start the car at least once a week for more than 5 minutes to recharge the battery. 3. Charging precautions: Generally, it takes 4-5 hours to fully charge the battery, and overcharging should be avoided.