What Should A Full 12v Battery Read. After you have done these you wont still know if your battery state if you dont understand the outcome of the test so. 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.
The chart is listed below. How do I bring my AGM battery back to life. Some batteries have a built-in charge indicator.
To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off preferably overnight this provides you with the car battery open circuit voltage or also know as the resting voltage.
Voltages and Specific Gravity are listed for a 6-volt or 12-volt battery and battery banks of 24 and 48 volts. A green dot tells you the battery is 75 percent or more charged. After you have done these you wont still know if your battery state if you dont understand the outcome of the test so. FWIW the voltage of a fully charged 12 volt battery which is not supplying any current is about 132V not 12V.
