Gomadic Portable External Battery Charging Kit suitable for the Samsung Convoy 3 Includes Wall, Car and USB Charge Options Intuitive color coded LED light indicators display when the battery is properly connected, in charging state, and fully charged. Super easy to use! Gomadic Kit includes ability to charge the Samsung Convoy 3 battery from a variety of power sources including AC wall outlets, DC car cigarette ports, or any standard USB port Specification: Samsung Convoy 3 Supported, Dimensions: 2.0 X 4.0 X 0.5 inches, Power Input: 110-240 VAC, USB Output Power: 5.0 VDC Charger includes an additional side USB port which can be used to charge a second accessory. Adjustable Contact System (ACS) can be tailored to accept various battery shapes and sizes.