![]() While your engine runs, the alternator recharges the battery - which is why you typically don't have to worry about the battery dying while you're blasting the radio on your drive to work! But when the engine is off, the alternator can't recharge the battery, allowing little electrical mishaps to drain your battery entirely. What may drain a car battery when it's off are things such as interior lights, door lights, or even bad relays. These things shouldn't have a major impact on your battery. Something is causing a "parasitic draw."Įven while your car is off, your battery provides power to things like the clock, the radio, and the alarm system. But if your car doesn’t have this feature, your headlights may stay on until you either turn them off or till your car battery is completely drained. Many newer vehicles have headlights designed to turn off after a certain amount of time. If your car battery keeps draining, the first things to check are your lights. So, put those jumper cables aside, and check out these seven things that could explain why your car battery keeps dying. To help prevent a dead battery, you first have to know what causes one. What Drains a Car Battery?Ī dead car battery can be annoying, but it can also be avoided. And though your car battery probably isn't going to many social gatherings in its off-hours, there are still plenty of other things that may leave it feeling just as drained. ![]() A lot of things can leave you feeling drained, like an unbalanced diet, a long day at work, or even spending too much time with others.
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