Fully charged automotive batteries should measure at 12.6 volts or above. When the engine is running, this measurement should be 13.7 to 14.7 volts. If you don't have a multimeter to tell you the voltage of your battery, you can do a test of your electrical system by starting the car and turning on the headlights.
BATTERY TESTING CHART. Replace Battery. PASS. FAIL. Check Electrolyte level in each cell. PASS. FAIL. Visually Inspect Battery for Physical Condition:.
Learn how to decipher the meanings of your battery's test results so you can better determine. A full charge cannot be restored by simply driving the vehicle. 4.