What is the lifespan of a car battery?
2 Answers
The lifespan of a car battery is 3 years, and its functions are: to supply power to the starting system, ignition system, electronic fuel injection system, and the car's electrical appliances during engine startup. Methods to check for insufficient battery power: 1. The car struggles to start, indicating battery depletion; 2. The battery warning light turns on; 3. The car horn sounds weaker. Precautions for charging a car battery: 1. Connect directly to the battery for charging, avoid removing the battery to prevent data loss; 2. A battery voltage 10% below the rated voltage will lead to battery depletion; 3. Avoid water contact with the battery during charging.
I've been driving for twenty years, and car batteries typically last between two to five years. Based on my own experience, the longest one lasted over five years, but the worst one died after just two years, mainly due to leaving the car parked for too long without driving it. That time I went on a business trip for a month without moving the car, and when I returned, it wouldn't start at all—completely dead. After towing it to the shop, they found the battery had leaked internally. Remember, if you frequently take short trips, driving less than ten kilometers each time, the battery won't charge fully, and wear will accelerate. Cold starts in winter consume more power, which can shorten the battery's lifespan. Nowadays, I regularly check the battery with a voltmeter—12.5 volts or higher is considered healthy, while below 12.2 volts is risky. For those who drive infrequently, I recommend starting the car at least once a week and driving for over twenty minutes to avoid sudden breakdowns. Battery lifespan isn't heavily influenced by the brand; maintenance habits are key. A well-maintained battery can save you a lot of money.
