What Should A Fully Charged 12v Car Battery Read. For a 12 volt leadacid battery the voltage measured between these two points should be between 11 and 13 volts. When charging it charges at 225 volts per cell for a total of 135 volts.
The green triangle shows how much energy it requires to fully charge the battery. If you dont have a multimeter to tell you the voltage of your battery you can do a test of your electrical system. The closer the voltage is to 13 volts the closer the battery is to being.
With the engine off you should get a reading of 126 volts.
A green dot tells you the battery is 75 percent or more charged. A reading of 1266 volts indicates a fully charged battery. A fully charged battery will typically display a voltmeter reading of about 126 to 128 volts. 34 to 40 Amp hours.
