Gomadic Portable AA Battery Pack designed for the Magellan Roadmate 1424 - 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 (Magellan Roadmate 1424 specific), TipExchange enabled (Yes) Integrated circuitry regulates output voltage specific to the Magellan Roadmate 1424. 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. A must have accessory for the frequent traveler, camper or heavy Magellan Roadmate 1424 user. Internal circuit designed to protect your Magellan Roadmate 1424 from power surges, overcharging and short circuiting.