Unique Gomadic Portable Rechargeable Battery Pack designed for the Panasonic HC-V550 / V550 - High Capacity Gomadic charger that fits in your pocket Specification: Internal Battery (7800mAh lithium polymer), Input port (microUSB), Output Port (Standard USB), Onboard Circuit Design (Panasonic HC-V550 / V550 Specific), Dimensions (2.75 X 3.25 X 0.75 inches), TipExchange enabled (Yes) Integrated circuitry tailors output voltage and charging current to exact specification of the Panasonic HC-V550 / V550 (accurate to 0.1v). Very easy to operate. Simply connect Panasonic HC-V550 / V550, press activation button on pack, and charging begins. Quick start guide included. Continue to use your Panasonic HC-V550 / V550 for hours OR recharge it on the go without being tethered to a wall outlet Charging kit includes: Rechargeable Lithium Battery Pack, USB input/output cable, Panasonic HC-V550 / V550 Charging Connection, and Battery Pack input connection.