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How Many Days Can a Car Battery Sit?

1 Answers

DelGabrielle

07/29/25 2:28pm

An car battery can typically sit for about 15 days, and it will generally fail to start the vehicle if left unused for over 30 days. The functions of a car battery include: 1. Providing power to the starting system, ignition system, and electronic fuel injection system when starting the engine; 2. Supplying power to the vehicle's electrical equipment when the engine is off or idling at low speed; 3. Assisting in powering electrical devices when the generator's output is insufficient; 4. Mitigating voltage surges in the electrical system to protect the vehicle's electronic components; 5. Storing excess electricity generated by the alternator. Precautions for charging the battery are: 1. Connect directly to the battery for charging to avoid data loss caused by removing the battery; 2. A battery voltage 10% below the rated voltage may lead to battery discharge; 3. Prevent water from entering the battery during charging.

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