Gomadic High Capacity Rechargeable External Battery Pack suitable for the Panasonic HC-V260/HC-V270 Specification: Internal Battery (7800mAh lithium polymer), Input port (microUSB), Output Port (Standard USB), Onboard Circuit Design (Panasonic HC-V260 / HC-V270 Specific), Dimensions (2.75 X 3.25 X 0.75 inches), TipExchange enabled (Yes) Very easy to operate. Simply connect Panasonic HC-V260 / HC-V270, press activation button on pack, and charging begins. Quick start guide included. Integrated circuitry tailors output voltage and charging current to exact specification of the Panasonic HC-V260 / HC-V270 (accurate to 0.1v). Designed with a front facing LED display that clearly display the current battery capacity at the touch of a button Built using unique Gomadic TipExchange Technology that protects your investment by providing the ability to upgrade charging ports by simply swapping the physical connector.