Portable Emergency AA Battery Charger Extender suitable for the Jaybird Bluebuds X - 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 Jaybird Bluebuds X. 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 (Jaybird Bluebuds X specific), TipExchange enabled (Yes) A must have accessory for the frequent traveler, camper or heavy Jaybird Bluebuds X user. This Gomadic Battery Pack is uniquely designed to work with both standard (e.g. alkaline) and/or rechargeable AA batteries.