What Charge Should My Car Battery Be. A fully charged car battery voltage should be 126v or above this is with the engine off. Consider your car battery charged at 124 volts or higher and discharged at 1239 volts or less.
When a car drops for instance from 126 to 120 there will be 75 difference. Your car battery is charged about 25 or less. To avoid this situation the battery should be replaced before its capacity drops to a critical level.
With the engine off you should get a reading of 126 volts.
When the vehicle is parked for extended periods of time the battery deteriorates sooner. Our Research Has Helped Over 250 Million People Find the Best Products. If you dont have a multimeter to tell you the voltage of your battery you can do a test of your electrical system by starting the car and turning on the headlights. Cars have very different effects on the alternators giving everything from 30 to 150 amperes.
