How Many Volts Should Car Battery Read

The ideal car battery voltage with the engine running is between 137 and 147V.

How many volts should car battery read. How many volts should my AGM battery have. Any voltage above 129 volts is a good indicator that your battery has excessive. Too any voltage drop internal to the battery results in heating of the battery.

With this method a hydrometer measures battery voltage. When the engine is running this measurement should be 137 to 147 volts. Its 120-121V 120 after unlockingdisabling the alarm with my remote rising to 121 after a minute.

When the engine is running this measurement should be 137 to 147 volts. Any voltage above 129 volts is a good indicator that your battery has excessive voltage. A fully charged battery will typically display a voltmeter reading of about 126 to 128 volts.

Fully charged automotive batteries should measure at 126 volts or above. If the voltmeter reads between 14 -15 volts then the battery is normal. The first test with your multimeter will measure DC voltage indicated with a solid line and a dashed line above a letter V.

A good car battery should read 124-129 volts when the car is off. Check the reading. A fully charged car battery voltage should be 126v or above this is with the engine off.

Touch the red probe to the positive terminal and the black probe to the negative terminal. 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. First connect the redpositive cable to the redpositive battery terminal.