What Causes Automatic Battery Drain When a Vehicle is Parked for Three Days?

[VonColin]

Forgetting to turn off the interior lights when parking and turning off the engine, as well as temperature factors, are common causes of vehicle battery drain. Here are the specific details: 1. Forgetting to turn off the interior lights when parking and turning off the engine is a small mistake many car owners make. After a night of consumption, the battery may run out of power at any time, making it impossible to start the car. In such cases, if conditions permit, you can try charging the battery. If that doesn't work, the battery may need to be replaced. 2. Temperature, or weather, is another significant factor. Low temperatures can drastically reduce battery performance, leading to situations where the battery is too weak to start the engine.