How Long Does It Take for a Car Battery to Recover After Being Drained?

1 Answers
CarsonRose
07/29/25 12:52pm
If the car battery is drained, idling the engine for about 20 minutes or driving for half an hour can help it recover. For the next start, a healthy battery will not be affected at all. However, if the battery is severely drained, it is recommended to use a battery charger for proper charging. Otherwise, relying on the car's alternator for charging will take a significant amount of time and may not yield ideal results. Taking a 12V60Ah battery as an example, the charging method involves constant voltage with current limitation: charge at 14.8V with a 15A current limit for 16 hours, followed by a constant current of 3A for 4 hours, totaling 20 hours.
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