What is the normal charging voltage for a car battery?

1 Answers
VanCharlie
07/29/25 1:01pm
Car battery charging voltage should normally be between 13.5v and 14.5v. The no-load charging voltage is around 13v, and the load voltage should not be lower than 11v. If it falls below this voltage, the car may have difficulty starting. Once started, the alternator begins generating electricity. The battery is charged by the alternator during normal vehicle operation. However, vehicles left parked for extended periods can easily lose battery power, as many cars come with built-in alarms that gradually drain the battery over time, eventually making it impossible to start the vehicle. During long-term parking, it's best to start the vehicle at least once a week for more than 5 minutes to recharge the battery.
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