Gomadic Portable AA Battery Pack designed for the Motorola MILESTONE XT720 - Powered by 4 X AA Batteries to provide Emergency charge. Built using TipExchange Technology Built using the unique Gomadic TipExchange Technology that protects your investment by providing the ability to upgrade charging ports by simply swapping physical connectors. Integrated circuitry regulates output voltage specific to the Motorola MILESTONE XT720. Advanced logic maximizes overall charger efficiency. Specification: Input Voltage (4 X AA Batteries), Cable length (6 inches), Dimensions (5.0 X 1.5 X 0.75 inches), Circuit Design (Motorola MILESTONE XT720 specific), TipExchange enabled (Yes) Internal circuit designed to protect your Motorola MILESTONE XT720 from power surges, overcharging and short circuiting. Easy to operate. Simply insert batteries, toggle on/off switch and your Motorola MILESTONE XT720 will start to charge.