How Many Volts Is A Car Battery Supposed To Be. Your cars electrical system may have drained it or there may be an issue with your alternator. It is important to see in the calculations above.
A 12-volt battery is standard in most modern vehicles. It is important to see in the calculations above. When the engine of your vehicle is running the voltage of your car battery should be between 135 and 147 volts.
Do a load test.
A good car battery should read 124-129 volts when the car is off. Do a load test. Anything lower doesnt necessarily mean the battery is bad. Fully charged automotive batteries should measure at 126 volts or above.
