How Many Years Does a Household Car Battery Generally Last?

[JudeLee]

Household car batteries generally last for about 3 to 4 years. Methods for battery maintenance include: 1. After turning off the engine, avoid listening to music or using other electrical equipment in the car for extended periods; 2. Disconnect the negative terminal of the battery when the car is not in use for long periods; 3. Check whether the battery is securely fixed in the car and whether there are any dents on the surface of the casing; 4. Check whether the battery cables are securely connected and whether the exhaust vents are free of dust; 5. Use the battery's inspection window to check the charging status and quality condition. The functions of the battery include: 1. Providing a strong starting current to the starter when starting the engine; 2. Assisting the generator in supplying power to electrical equipment when the generator is overloaded; 3. Supplying power to electrical equipment when the engine is idling; 4. Acting as a large-capacity capacitor to protect the car's electrical appliances; 5. Converting part of the electrical energy into chemical energy for storage when the generator's terminal voltage is higher than the electromotive force of the lead-acid battery.