Does Battery Voltage Stay Constant When Car is Turned On? Explore Voltage Changes and Performance
The battery voltage does not stay constant when you turn on the car. With the engine off, a fully charged car battery shows a resting voltage of about 12.6 volts. When the engine runs, the voltage rises to 13.5 to 14.5 volts. This increase happens because the alternator charges the battery and powers the electrical … Read more