·  Monitors Battery Health: With the engine off, the gauge shows the battery's resting charge. A healthy, fully charged battery typically reads about 12.6 volts.
·  Checks Alternator Performance: Once the engine is running, the gauge should rise to between 13.5 and 14.8 volts. This indicates the alternator is successfully charging the battery and powering the car's electronics.
·  Detects Electrical Loads: You can see the needle move or the digital readout dip when you turn on high-draw accessories like headlights, wipers, or the heater.
52mm
12V