How Long Does It Take to Fully Charge a Car Battery When the Engine Is Running

[DelBarrett]

It takes approximately 4-5 hours to charge. Here is more information about car batteries: 1. Battery maintenance precautions: Avoid storing the battery in a discharged state. A discharged state refers to when the battery is not charged promptly after use, which can easily lead to sulfation. Lead sulfate crystals adhere to the plates, blocking ion channels and resulting in insufficient charging and reduced battery capacity. The longer the battery remains idle in a discharged state, the more severe the damage. When the battery is not in use, it should be charged once a month to extend its lifespan. 2. Battery function: It supplies electricity to the engine. When the vehicle is about to start, the battery discharges to provide power to the starter, which then drives the flywheel and crankshaft to start the vehicle. When the engine's power supply is insufficient or not started, it provides power to in-car electrical appliances such as the audio system and lighting system. Once the engine begins to supply power normally, the battery collects and stores electrical energy for future use.