How long does the car battery generally last? It is most reasonable to replace it every few years

Car batteries are consumables, have a certain service life, and need to be replaced after a period of use. The car battery generally lasts for 2-5 years, depending on the type, usage and maintenance of the battery. If it is properly maintained in normal times, coupled with good car use habits, the life of the car battery can be extended to a certain extent, which can be used for 4-5 years.

Car batteries are divided into maintenance-free batteries and ordinary batteries (lead-acid batteries). At present, most models use maintenance-free batteries, while most Japanese cars use ordinary batteries. The electrodes of ordinary batteries are composed of lead and lead oxides. The electrolyte is an aqueous solution of sulfuric acid, and the life span is generally about 2 years, so it is most reasonable to replace it every two years. The maintenance-free battery is relatively durable, and is generally replaced in about 3 years.

If you want to extend the service life of the battery, you need to maintain the battery regularly and have good car usage habits. When the electrolyte is insufficient, the battery will not be stored and needs to be refilled in time; after the car is turned off, make sure that the lights are turned off to avoid excessive loss of battery power; if the car is parked for a long time, it is recommended to unplug the battery negative electrode. Power off the battery to avoid power loss. It is best to start the car once a week. The battery will be charged by the internal generator when the engine is idling, so as to ensure that the battery has enough power for the next start.