Why do car batteries die so often in Orlando's heat?
Heat speeds up the chemical wear inside a battery, so Florida batteries often fail from the heat of the previous summer. The failure usually shows up on a cooler morning or after the car sits for a few days.
A car battery wears out faster when it lives under a hot hood, and Orlando has long, hot summers with little relief at night. Heat also evaporates fluid inside the cells and corrodes the posts, which weakens the connection. The battery can seem fine through July and then fail the first time the car sits a week while you travel. Short trips do not give the alternator time to recharge it, and an air conditioner running all day adds load. Batteries in this climate often wear out sooner than people expect, so a battery that is several years old is a suspect. If the car has needed a jump once, plan to have the battery tested, because it is likely to need another. A roadside jump start brings the car back to life but does not fix a tired battery.
