aluminum Design; usb Input Allows Charge Via Notebook; includes Micro-usb Cable; internal Li-polymer 7,000 Mah Rechargeable Battery; 2.1a For Fast Charging; charges 2 Devices At Once Via Dual Usb Ports; up To 1,000x Rechargeable; charging Time: 7.5 Hours Dedicated/ac, 15 Hours Standard Usb Port; provides Phone With 10-28 Hours Talk Time