Portable Emergency AA Battery Charger Extender suitable for the Samsung Gleam - with Gomadic Brand TipExchange Technology Integrated circuitry regulates output voltage specific to the Samsung Gleam. Advanced logic maximizes overall charger efficiency. 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 (Samsung Gleam specific), TipExchange enabled (Yes) This Gomadic Battery Pack is uniquely designed to work with both standard (e.g. alkaline) and/or rechargeable AA batteries. This Gomadic Battery Pack can be reused forever by simply inserting fresh batteries, providing instant power on demand.