Battery Voltage While Driving: Normal Readings, Fluctuations, and Troubleshooting
A fully charged car battery shows about 12.6 volts when the engine is off. While driving, the voltage increases to 13.5-14.5 volts because of the alternator. A healthy battery typically operates around 14 volts when running. The minimum voltage for charging is 13.2 volts. The voltage may change with engine speed and electrical load. Troubleshooting … Read more