Gomadic Advanced Motorola DROID compatible AA Battery Pack Charge Kit &ndash; Portable power built with upgradeable 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. Specification: Input Voltage (4 X AA Batteries), Cable length (6 inches), Dimensions (5.0 X 1.5 X 0.75 inches), Circuit Design (Motorola DROID specific), TipExchange enabled (Yes) Integrated circuitry regulates output voltage specific to the Motorola DROID. Advanced logic maximizes overall charger efficiency. This Gomadic Battery Pack is uniquely designed to work with both standard (e.g. alkaline) and/or rechargeable AA batteries. Internal circuit designed to protect your Motorola DROID from power surges, overcharging and short circuiting.