Why does the car battery die after being parked for two days?

[SanSara]

The reasons why the car battery dies after being parked for two days are as follows: 1. Limited battery lifespan: The car battery has reached its designed service life. After the vehicle has been driven for a certain mileage or reached a certain age, the battery degrades and its capacity decreases. At this point, the battery's energy storage capacity is reduced, and even if fully charged, it may still fail to start the vehicle after being parked for a few days, requiring timely replacement. 2. Battery discharge: The battery has been in a discharged state for a long time. The car's alternator charging system cannot fully charge the battery in a short time, leading to continued discharge after being parked for a few days. 3. Car electrical leakage: There is an electrical leakage in the car. The wiring in the car's electrical system is damaged. In the car's circuit, the battery's negative terminal is grounded, and due to car vibrations, the positive terminal wiring may wear out, causing minor grounding and resulting in electrical leakage.