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How long does a stock 12 volt car battery last?

The average lifespan of a stock 12-volt car battery is around 3 to 5 years. However, this can vary greatly depending on several factors, including:

1. Climate: Extreme temperatures, both hot and cold, can shorten battery life. Hot temperatures can cause the battery to lose water and become damaged, while cold temperatures can slow down the chemical reactions inside the battery and reduce its capacity.

2. Driving Habits: Frequent short trips can stress the battery, as the alternator does not have enough time to fully recharge the battery. Long, continuous drives allow the battery to fully charge and help extend its lifespan.

3. Electrical Load: Additional electrical components and accessories, such as high-wattage sound systems, can put extra strain on the battery and reduce its lifespan.

4. Maintenance: Regular maintenance, such as checking the battery terminals for corrosion and ensuring proper fluid levels (for flooded batteries), can help prolong battery life.

5. Battery Type: Different types of batteries, such as lead-acid, AGM (Absorbent Glass Mat), and EFB (Enhanced Flooded Battery), have varying lifespans. AGM and EFB batteries tend to last longer than traditional lead-acid batteries due to their improved construction and resistance to heat.

6. Vehicle Make and Model: The make and model of your vehicle can also affect battery life. Some vehicles may have specific electrical systems or designs that put additional stress on the battery.

By following proper maintenance practices and considering the factors mentioned above, you can help maximize the lifespan of your car battery.