![]() Your car battery is still powering some components once the engine is turned off such as the clock and anti-theft features. What it does is continues to discharge the battery even after shutting the engine off. Parasitic drain is another common cause of why a car battery died overnight. However, newer production cars tend to come with an alert system that tells you that you have left a component open before leaving your vehicle.īe sure to turn off all lights before leaving your car. Leaving a car component open overnight while the engine is turned off will cause your car battery loses charge overnight. There are also episodes when we don’t notice that a car light is left turned on especially in broad daylight where it is almost impossible to notice them. ![]() We sometimes forget to turn off a car component as we leave our vehicle since we are already tired from work. One of the most common causes of a drained car battery is human error. What can drain a car battery overnight: 5 possible causes Cause #1: Left components open There are various causes for a car battery loses charge overnight which can be fixed with few simple steps. However, a drained battery does not mean that it’s time for a replacement. If your car battery is drained, then it won’t supply the sufficient power needed for ignition. EASILY Identify Vehicle Battery Draining Problems(Parasitic)Ī car battery is responsible for sending power to the starter motor to start cranking the engine.
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