How long does it take to jump-start a car with a dead battery?

1 Answers
ORose
07/29/25 4:21pm
It takes about 5 to 10 minutes to charge a dead car battery enough to jump-start the engine. 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 car's electrical equipment when the engine is off or idling at low speed; 3. Assisting in power supply when the electrical demand exceeds the generator's capacity; 4. Stabilizing voltage to protect the car's electronic devices. Methods to maintain a car battery: 1. Regularly clean the battery; 2. Avoid using electrical equipment when the engine is off; 3. Regularly inspect and replace the battery; 4. Start the car periodically.
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