Never get left with a low or dead battery with this universal USB battery charger. If you have any type of power source you can take advantage of it with this power adapter. 3 in 1 combination charger is designed for cell phones with a dock connector. Unit includes a USB charger adapter cable, adapter for a 12v car cigarette lighter outlet, and a wall socket adapter. Intelligent IC circuits manage charging status to prevent over and under charging, and backflow to car’s electrical system.