Manufacturer's Description DC Cable for Lumix G Series Micro System Digital Cameras The DCC3 mains adaptor provides power from an AC outlet for extended operation. The battery in the camera is replaced by the DCC3 which then connects via the battery charger to offer a continuous power source when shooting indoors or outside (where a safe mains supply is available). This is ideal for events such as parties wher you are not reliant on the shooting time offered by the battery alone.