How Long Must a Car Run to Charge the Battery? Key Factors for Keeping It Charged
To sufficiently charge a car battery after a jump-start, let the vehicle run for at least 30 minutes. Charge time varies based on battery health and alternator function. Driving the car instead of idling improves charging efficiency. Regular maintenance helps maintain battery health for longer running times. First, the alternator’s output varies with engine speed. … Read more