How long does it take to recharge a dead car battery by driving?

1 Answers
GrantDella
07/29/25 2:55pm
It takes about 4 hours of driving to recharge a dead car battery. The alternator in the car needs to operate at over 2000 RPM to reach full load capacity, at which point its power generation meets the standard value specified on the nameplate. However, it is not recommended to use the car's alternator to charge a completely dead battery. Car battery maintenance methods include: 1. Avoid parking the car in open parking lots for extended periods to prevent the battery from freezing and getting damaged; 2. In winter, when the car engine is harder to start, each attempt to start the car should not exceed 5 seconds, with an interval of at least 15 seconds between attempts; 3. Regularly charge the battery by starting the car periodically; 4. Clean the battery terminals periodically and apply special grease to protect the wiring; 5. Avoid using car electronics after the engine is turned off.
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