How Many Volts To Charge A 12 Volt Battery. You need to leave the battery alone for at least a couple of hours after charging. Twelve volts is just a nominal convenient term used to distinguish one battery from another.
The terminal voltage of a lead acid battery is determined by many factors but primarily by its state of charge. A 12-volt battery is not a 12-volt battery. It can take as long as 24 hours to get the battery up to an acceptable charge depending on how depleted your battery is when you start charging.
If the alternator is putting out too much voltage 15 volts it is likely your battery acid will boil over out of the battery.
In simpler terms volt or voltage is the amount of pressure thats needed to let the electrons flow. When fully charged each cell 42 volt. Any voltage above 129 volts is a good indicator that your battery has excessive voltage. With experience one can accurately determine state of charge using a voltmeter.
