What is the general charging current for a car battery?

[GeorgeMarie]

The general charging current for a car battery is related to its capacity, typically one-tenth of the battery capacity. For most household cars, the battery voltage is 12V, and the capacity is around 60Ah, meaning a charging current of 6A is normal. Precautions for battery charging include: 1. Connect directly to the battery for charging to avoid data loss from removing the battery; 2. A battery voltage 10% below the rated voltage may lead to battery discharge; 3. Avoid water ingress during charging. The functions of the battery are: 1. When starting the engine, it powers the starting system, ignition system, and electronic fuel injection system; 2. It supplies power to the car's electrical devices when the engine is off or at low idle; 3. It can assist in powering electrical devices when the generator's output is insufficient; 4. It mitigates voltage spikes in the electrical system, protecting the car's electronic devices; 5. It stores excess electricity generated by the alternator.