Fix Car Battery Drain

If the battery drains when the vehicle sits for three or four days that s a lower amp draw than one that drains.

Fix car battery drain.

What causes a car battery to keep dying. A car alternator recharges the battery and powers certain electrical systems like lights radio air conditioning and automatic windows. Car battery problems specially a parasitic battery drain are difficult to diagnose sometimes. In other words car battery drains when it is not charged enough which is a common problem when using powerful amplifiers.

That seems like a tiny amount but a single incandescent dome light pulls enough power to drain a battery in one day. Remember that the drain doesn t have to take your battery to zero overnight just low enough for it to not start. The simple answer is yes but a car battery can only be drained when it sends more power than receives back from an alternator. Some of the most common reasons for a car battery to die repeatedly include loose or corroded battery connections persistent electrical drains charging problems constantly demanding more power than the alternator can provide and even extreme weather some of these problems are enough to kill a battery on their own while others are usually coupled.

Why does a car need battery. If your alternator has a bad diode your battery can drain. The bad alternator diode can cause the circuit to charge even when the engine is shut off and you end up in the morning with a car that won t start.