How long does it take to fully charge the battery when the car is running?

[LawsonLynn]

It takes 20 hours to fully charge the battery when the car is running. The charging method for a 12V60Ah battery is constant voltage and current limiting. Charge at a constant voltage of 14.8V and a current limit of 15A for 16 hours, followed by a constant current of 3A for 4 hours, totaling 20 hours of charging time. The optimal charging time for a car battery is between 18 to 24 hours. In low-temperature environments, the battery capacity is much lower than at normal temperatures, so car owners should regularly inspect and maintain the battery. Avoid leaving the car parked in open parking lots for extended periods. If the car is to be parked long-term, the battery should be removed and taken away to prevent freezing damage. After turning off the car, all high-power electrical devices should be turned off to avoid damage to the car battery.