Portable Emergency AA Battery Charger Extender suitable for the Garmin Nuvi 350 - with Gomadic Brand 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. Integrated circuitry regulates output voltage specific to the Garmin Nuvi 350. Advanced logic maximizes overall charger efficiency. Specification: Input Voltage (4 X AA Batteries), Cable length (6 inches), Dimensions (5.0 X 1.5 X 0.75 inches), Circuit Design (Garmin Nuvi 350 specific), TipExchange enabled (Yes) Internal circuit designed to protect your Garmin Nuvi 350 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.