Portable Emergency AA Battery Charger Extender suitable for the Sonocaddie v500 Golf GPS - 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 Sonocaddie v500 Golf GPS. 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 (Sonocaddie v500 Golf GPS specific), TipExchange enabled (Yes) 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.