Their internet site (US) has a picture of it being used in a car and apparently charged from the car's 12V system. There is a symbol of the car cigarette 12V plug on the picture. However, the A/C is shown with its battery, so I think the 12V only charges the battery, you probably cannot run the device directly off the car's 12V supply, I don' think it has enough power (although that varies from car to car). You don't get the 12V cable with the A/C, and I also didn't get it with the battery, which I bought separately.