How Many Volts Should A Fully Charged Car Battery Have. A reading of 1266 volts indicates a fully charged battery. The voltage reading of 124 volts will indicate that the battery is only 75 percent charged.
Although a battery is called 12 volt battery its voltage varies from about 12. Some batteries have a built-in charge indicator. The actual resting voltage or the voltage a battery will settle at 12-24 hours after being removed from the charger is closer to 21 volts per cell or about 64 volts for a 6v battery and 127 volts for a 12v battery.
If the battery isnt fully charged it will diminish to 124V at 75 12V when its only operating at 25 and down to 119V when its completely discharged.
A fully charged car battery has 126 volts. This makes one quite curious to know how many volts is a car battery when fully charged. Check the reading. A fully charged car battery voltage should be 126v or above this is with the engine off.
