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How Long Does a Car Battery Last?

2 Answers

LaMia

07/24/25 6:41am

Car batteries typically last about 3 years. Here are some methods to extend battery life: 1. Use the battery frequently: Many modern cars use lead-acid batteries. If the car remains idle for extended periods, the sulfuric acid inside may settle, leading to natural discharge. Prolonged inactivity can result in insufficient power supply and significantly reduce battery lifespan. 2. Clean the battery terminals: The area around the terminals is not completely sealed. When the car is in motion, any movement can cause electrolyte to leak from the terminals. This electrolyte can undergo chemical reactions in the air, affecting the battery's normal operation. 3. Regularly inspect the alternator: The battery relies on the alternator for charging. If the alternator malfunctions, the battery will be severely impacted, leading not only to insufficient power supply but also to continuous depletion of the battery's durability.

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OBlakely

08/11/25 2:27am

I've been driving for nearly thirty years and have replaced quite a few car batteries. Under normal usage, most batteries last around three to five years. From my experience, if you frequently take long trips that allow the battery to charge fully, combined with proper maintenance, it can last five years or even longer. However, if you only drive short distances, like commuting, where the battery doesn’t have enough time to fully charge before stopping, its lifespan may shorten to just over two years. Weather also plays a big role: summer heatwaves can cause the electrolyte to evaporate faster, while winter cold makes starting the engine harder and drains more power, both accelerating aging. I make it a habit to check the voltage and terminal connections every six months—keeping it above 12.6 volts with a multimeter is ideal. If the voltage drops below 12.4 volts or the engine cranks slower, replace it immediately without hesitation. When replacing, opting for a maintenance-free type is more convenient—slightly pricier but hassle-free. These simple habits have kept my batteries trouble-free most of the time. Road safety depends on staying vigilant.

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