What methods are used to charge a car battery?

[Lucille]

Car batteries are charged by starting the vehicle and allowing the engine to run, which generates electricity. The functions of a car battery include: 1. Providing a strong starting current to the starter when starting the engine; 2. Assisting the alternator in supplying power to electrical devices when the alternator is overloaded; 3. Supplying power to electrical devices when the engine is idling; 4. Protecting the vehicle's electrical components; 5. Converting part of the electrical energy into chemical energy for storage when the alternator's voltage exceeds the battery's electromotive force. Methods for maintaining a car battery include: 1. Avoiding excessive use of the battery; 2. Regularly cleaning the positive and negative terminals; 3. Periodically checking the battery's vent holes to prevent blockages; 4. Preventing the battery's water level from becoming too low; 5. Starting the vehicle once a week if it is parked for an extended period.