How many years can a normal car battery last?
2 Answers
Normal car batteries can last 2 to 4 years. Car batteries are divided into maintenance-free batteries and regular batteries (lead-acid batteries). Currently, most car models use maintenance-free batteries, while many Japanese cars use regular batteries. The electrodes of regular batteries are made of lead and lead oxide, with the electrolyte being a sulfuric acid solution, and their lifespan is generally about 2 years. Therefore, replacing them every two years is reasonable. Maintenance-free batteries are relatively more durable and usually need to be replaced every 3 years. To extend the battery's lifespan, regular maintenance is required, along with good driving habits. When the electrolyte is insufficient, the battery won't hold a charge, so it's necessary to replenish it promptly.
I've been driving for many years and have replaced several batteries. Generally, they last about four years with normal use, but it varies. If you only drive short distances daily, like a 10-minute commute from home to work, the battery may not fully charge and could fail in less than three years. Once, my car wouldn't start in the morning because of this. Extreme heat or cold is also harsh on batteries—summer heat speeds up evaporation, and winter cold can freeze the battery fluid. Friends in northeastern China say their batteries only last about two years. Avoid unnecessary electrical usage when parked, like leaving the AC or lights on, to conserve power. It's a good idea to have the battery voltage checked every six months at a repair shop; around 12.6 volts is normal. Overall, four to five years is a safe lifespan—don’t hesitate to replace it after that. Saving money isn’t worth the hassle; safety comes first.
