. The Car Charger for Inspire 2 is used to charge the Intelligent Flight Battery or remote controller through a cars cigarette lighter port. When charging the Intelligent Flight Battery the Inspire 2 Intelligent Flight Battery Charging Hub is a must. It comes with low-voltage protection & overheating protection which automatically cut off charging if your starting battery voltage is too low or cigarette lighter port exceeds a certain temperature. The charge time for two fully charged batteries is 2.5 hours. Low voltage protection Overheating protection.