Gomadic Portable AA Battery Pack designed for the Samsung EPIX - Powered by 4 X AA Batteries to provide Emergency charge. Built using TipExchange Technology Specification: Input Voltage (4 X AA Batteries), Cable length (6 inches), Dimensions (5.0 X 1.5 X 0.75 inches), Circuit Design (Samsung EPIX specific), TipExchange enabled (Yes) 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 Samsung EPIX. Advanced logic maximizes overall charger efficiency. Internal circuit designed to protect your Samsung EPIX from power surges, overcharging and short circuiting. This Gomadic Battery Pack can be reused forever by simply inserting fresh batteries, providing instant power on demand.