Gomadic Portable AA Battery Pack designed for the Netgear Trek N300 PR2000 - 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. Specification: Input Voltage (4 X AA Batteries), Cable length (6 inches), Dimensions (5.0 X 1.5 X 0.75 inches), Circuit Design (Netgear Trek N300 PR2000 specific), TipExchange enabled (Yes) Integrated circuitry regulates output voltage specific to the Netgear Trek N300 PR2000. 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. Safely engineered with reverse polarity protection, in the event batteries are accidentally put in incorrectly.