The Mavic Pro Car Charger is used to charge the Intelligent Flight Battery through a car's 12 V outlet. It comes with low-voltage protection to ensure enough starting battery voltage for the car. Overheating protection will automatically cut off charging if your cigarette lighter port exceeds a certain temperature. 

Specifications 
Product Model: C3S78 
Operating Temperature: 41 Degree to 104 Degree F (5 Degree to 40 Degree C) 
Input Voltage: 12.3-16 V (Sedan); 25-30 V (Coach)
DC Output: 13.05 V; 6 A; 78 W
Charge Time*: 54 min
* The charge time was tested in a lab environment at room temperature and should be taken as reference only.