Gomadic Unique Portable Rechargeable Battery Pack designed for the Garmin DriveSmart 60LMT - High Capacity charger that fits in your pocket Integrated circuitry tailors output voltage and charging current to exact specification of the Garmin DriveSmart 60LMT (accurate to 0.1v). Very easy to operate. Simply connect Garmin DriveSmart 60LMT, press activation button on pack, and charging begins. Quick start guide included. Specification: Internal Battery (7800mAh lithium polymer), Input port (microUSB), Output Port (Standard USB), Onboard Circuit Design (Garmin DriveSmart 60LMT Specific), Dimensions (2.75 X 3.25 X 0.75 inches), TipExchange enabled (Yes) Built using unique Gomadic TipExchange Technology that protects your investment by providing the ability to upgrade charging ports by simply swapping the physical connector. Built with high capacity lithium polymer rechargeable battery technology (28 Wh / 7800 mAh) in a compact design.