The Nikon EP-5F Power Supply Connector is used to power Nikon 1 J5 Digital
Cameras when using the EH-5b AC Adapter, which is required and available
separately. This method of powering your camera conserves battery life and comes
in handy when working indoors for extended periods of time, such as when
shooting in the studio, uploading files to a PC, or playing back media on a TV.