I was hoping that the charger that comes with the Thermal would be usable with 12v from cigarette lighter socket in the car. I thought that perhaps the green usb was also power in but thei doesn't appear to tbe the case. Does anyone know what the green socket is intended for, just seems to be a normal USB socket. Nothing at all in the manual about the multi charger which I really like as it charges all the batteries at the same time unlike DJI chargers which only charge the one at a time.