The Rocketfish Mini USB Car Charger is compatible with most portable devices with a mini USB port including all Motorols phones sold by Big Sky Mobile. It features a built-in USB port for simultaneously charging any device with a USB connection such as iPhones, iPads, some GPS devices, etc. An LED light ring illuminates to indicate charging. There is also an internal fuse to withstand output short circuits. The intelligent IC chip automatically switches to saver mode when the battery is fully charged to prevent over charging of your devices.