Gomadic Portable AA Battery Pack designed for the Trimble TSC2 - 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 (Trimble TSC2 specific), TipExchange enabled (Yes) Integrated circuitry regulates output voltage specific to the Trimble TSC2. 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. This Gomadic Battery Pack is uniquely designed to work with both standard (e.g. alkaline) and/or rechargeable AA batteries. Easy to operate. Simply insert batteries, toggle on/off switch and your Trimble TSC2 will start to charge.