How many years can the original car battery last?

[LeAubree]

Original batteries can last about 3 years. Of course, this is not absolute, as the lifespan of the battery is greatly related to vehicle maintenance and usage habits. The functions of the battery and methods to extend its lifespan are as follows: Functions of the battery: During engine startup, it supplies power to the starting system, ignition system, electronic fuel injection system, and other electrical systems of the car; protects electronic devices; maintains voltage stability. Methods to extend battery life: When the car is not used for a long time, the owner should disconnect all onboard electrical devices from the battery to effectively prevent battery discharge; try not to use onboard devices or external power sources when the engine is off; always remember to turn off the headlights when parking at night; it is best to check the battery every six months.

[AaronLynn]

The original battery in my car lasted four and a half years before replacement. Most regular car batteries can last three to five years, depending heavily on usage habits. Since I commute one hour daily and frequently drive on highways during weekends, keeping the battery fully charged makes it more durable. Short-distance drivers are most prone to battery drain—each engine start consumes power that requires about 30 minutes of driving to recharge. I recommend getting a voltage tester clipped to the cigarette lighter; if the voltage drops below 12 volts, it’s a warning sign. Avoid parking under direct sunlight in summer, as high temperatures evaporate electrolyte. In winter, turn off the AC and stereo before starting the engine to prevent overloading the battery.

[Ariel]

When repairing cars, it's common to find that the original battery lasts only about four years. In fact, its lifespan depends on three key factors: first, the frequency of use—batteries left idle for long periods are prone to sulfation; second, modifications—installing high-power audio systems can shorten battery life; and third, extreme weather—battery capacity can halve in northern winters at -20°C. Be alert if you notice headlights dimming significantly or dashboard lights flickering during startup. It's best to check the battery terminals annually; if white crystals are present, rinse them off with boiling water to prevent poor contact.

[DeCaden]

The original battery usually lasts three to four years, and the longest I've seen lasted seven years. There are many maintenance tips: always turn off the air conditioning and headlights before shutting down the engine, and disconnect the negative terminal if the car is parked for more than two weeks. In winter, power on for 5 seconds before starting the engine—this trick works especially well for older cars. Nowadays, many cars come with auto start-stop features, which actually harm the battery more; it's recommended to install an AGM-specific battery. If you often hear the starter clicking but the engine won't start, there's a 90% chance the battery needs replacement. In emergencies, jumper cables can be used for rescue.

[AugustLee]

Factory-installed car batteries are generally more durable than replacements, typically lasting four to five years. The most crucial point is to avoid battery discharge—when installing a dash cam, always connect it to the ACC line. I make it a habit to check the electrolyte level monthly, keeping it at the MAX line for optimal performance. While maintenance-free batteries are now common, they still require monthly starts and half-hour charges if left unused for extended periods. Warning signs of a failing battery include increased instances of remote key malfunction and noticeably slower window operation—don’t wait until the battery completely dies before taking action.