Car Battery Voltage: What is the Correct Voltage and Essential Facts You Need to Know
A fully charged car battery measures 12.6 volts when the engine is off; this is called “resting voltage.” When the engine runs, the voltage increases to 13.5 to 14.5 volts. The alternator raises the voltage to keep the battery charged while the engine operates. Understanding car battery voltage is essential for several reasons. First, insufficient … Read more