Check the voltage output of your car battery quickly and easily. Simply plug this handy voltmeter into the cigarette lighter socket and get an instant readout of the electrical system voltage.

Car battery voltage display
Easy-to-see high brightness LED display
Powered by car cigarette lighter charger (DC 12~24 V)
Installation: Insert the jack into a cigarette socket
Voltage range: DC12~24 V
This digital gauge displays the voltage of the car battery.

Typical voltage readings for a healthy battery:
When engine running, the LED should display between 13.5V & 14.5V
With the engine off, and nothing turned on, the LED should display greater than 12V.
Measuring range: DC 8V - 30V �1.2%