Gomadic Advanced LG enV2 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 (LG enV2 specific), TipExchange enabled (Yes) Integrated circuitry regulates output voltage specific to the LG enV2. 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. A must have accessory for the frequent traveler, camper or heavy LG enV2 user.