What Voltage Is A Battery Dead? If the battery cannot reach higher than 10.5 volts when being charged, then the battery has a dead cell. If the battery is fully charged (according to the battery charger) but the voltage is 12.5 or less, the battery is sulfated. Sulfation is the natural byproduct when the battery
Can A Car Battery Have 13 Volts And Still Be Bad? Yes it is bad! Your battery should show about 12.6 V with the ignition OFF and very slightly below that with the ignition ON. With the engine running, you should see close to 14.2 V. Can a battery have voltage and still be bad?
How Much Voltage Should A Car Battery Have? When we take a closer look, we see car battery voltage can range anywhere from 12.6 to 14.4. With the engine off, the fully charged car battery voltage will measure 12.6 volts. This is known as “resting voltage.” When the engine is running, battery voltage will typically