Why does a car battery die after being parked for a long time?

1 Answers
OCourtney
07/29/25 10:02pm
Car battery depletion may be caused by insufficient battery electrolyte, internal battery failure leading to damage, etc. Below are some car battery maintenance methods: 1. In-car electricity usage: Maintain the vehicle battery by avoiding actions like listening to the radio loudly, charging mobile phones, or using air pumps while the engine is off. Prolonged use under these conditions can easily drain the battery, and frequent depletion significantly reduces battery lifespan. 2. Long-distance high-speed driving: Regular high-speed driving offers many benefits, not only clearing carbon deposits from the vehicle but also fully charging the battery. Generally, driving on the highway for over an hour can fully charge the car battery, keeping it in optimal condition. 3. Avoid prolonged vehicle inactivity: If the car is not used for an extended period, disconnect the battery cables or start the vehicle every two weeks and drive several dozen kilometers to ensure the battery remains functional. 4. High-power electrical connections: Many modern car accessories, such as car refrigerators, vacuum cleaners, and air pumps, have high instantaneous power consumption. Avoid directly powering these devices with the car battery. Instead, start the vehicle first before connecting any electrical equipment.
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