Gomadic Portable AA Battery Pack designed for the Tascam DR-100 MKII - Powered by 4 X AA Batteries to provide Emergency charge. Built using 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 Tascam DR-100 MKII. 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 (Tascam DR-100 MKII specific), TipExchange enabled (Yes) Easy to operate. Simply insert batteries, toggle on/off switch and your Tascam DR-100 MKII will start to charge. This Gomadic Battery Pack is uniquely designed to work with both standard (e.g. alkaline) and/or rechargeable AA batteries.