How Many Years Does a Car Battery Last?

1 Answers
TaliaFitz
07/30/25 9:57am
Under normal circumstances, a car battery can last 3 to 4 years. The battery is a crucial component in a car, responsible for supplying power to the vehicle's electrical devices. When the engine is not running, the battery powers all the electrical devices in the car. Once the engine is started, the alternator takes over the power supply. The battery is also responsible for starting the engine. Below are some car battery maintenance tips: Avoid prolonged parking: The battery installed in the car will self-discharge over time if the vehicle is left unused. It is recommended to drive the car at least once a week, preferably for more than 20 minutes, to allow the battery to recharge while driving. Close windows before turning off the engine: The car's windows and sunroof are powered by the battery. It is best to close all windows before turning off the engine, rather than after, or using the long-press lock button method to close them after exiting the vehicle. Keep the battery clean and tidy: Regular inspections are an effective way to extend the life of your car battery. Use a professional battery terminal brush or an old toothbrush to clean dust and corrosion from the positive and negative terminals. Apply a layer of petroleum jelly or grease to the contact surfaces to form a protective film.
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