With this Monitor Car Voltage Cigarette Lighter Adapter, you will not worried that your car battery has questions. And there are 2 charging ports that can charge your Phone, iPad. Compatible with mainstream cars with 12-24V voltage, not applicable to passenger cars, trucks, and engineering vehicles.
Normal Car Voltage:
Before Start The Car: 12.2V~12.8V
After Start The Car: 13.4V~15.2V
Please Replace Your Car Battery when Below 12V