How long do car batteries last?

The manufacturer of car batteries claims that the typical lifespan of their batteries is normally distributed with a standard deviation of 0.9 year. However, in a random sample of 10 batteries, the standard deviation was found to be 1.2 years.

How long can a car battery last on a shelf?

Less than six months might be the limit that a car battery can last on a shelf and still start your car. Even if batteries were left on the shelf for just five months, they could already be dead. In a single month, a car battery could lose 5% of its charge sitting on a shelf.

How do I know how long a car battery will last?

Why guess? Find out how long your own battery will last. Visit any place where Interstate is sold and ask for a fast, accurate battery test. FIND A LOCATION The car, the climate, the driver, even where you bought the battery — it all makes a major difference in how long you can expect your car battery to last.