What Voltage Is A 12v Battery Fully Charged. And also Charging lead-acid batteries. A 12-volt battery could take up to 12-24 hours to charge fully.
A fully charged battery will typically display a voltmeter reading of about 126 to 128 volts. In fact 12 volt is just a term used to distinguish one battery from another. Voltages and Specific Gravity are listed for a 6-volt or 12-volt battery and battery banks of 24 and 48 volts.
Battery voltage reacts highly to charging and discharging.
The actual open circuit voltage of a 100 charged battery is between 1270v and 1280v because each cell is approximately 213v. A fully charged 12-volt battery shows a total read of 126. A fully charged car battery voltage should be 126v or above this is with the engine off. How many volts is a fully charged deep cycle battery.
