Case Relay Camera Power System More cost effective than purchasing multiple proprietary camera batteries Power sources are non-proprietary. Power your camera with the same 5V battery you use to charge phones or tablets. Never need to charge camera batteries again. And never run out power. Compatible with most Canon, Nikon, Sony, and Panasonic cameras. A Relay Camera Coupler (sold separately) is required to use Case Relay Camera Power System. Case Relay is ideal for time-lapse photography, astro-photography, or any photography that re- quires extended shooting time such as nature, fashion, landscape, architecture and more.