This DC Coupler lets you connect to a D-Tap power source using your camera's EN-EL15 battery compartment, providing long runtimes and unrestricted movement! DC couplers provide long-lasting power to a camera and are especially useful for video, long studio shoots, or events. The ProMaster DC Coupler with D-Tap connects to a D-Tap power source such as a V-Mount battery, providing extended runtimes far greater than standard camera batteries while allowing for unrestricted movement. This is an excellent option for powering a camera when using a cage or shoulder rig. This battery is compatible with the following Nikon cameras: D500 D600 & D610 D750 & D780 D7100, D7200, & D7500 D800 & D800E D810 & D810A D850 Z5 Z6 & Z6II Z7 & Z7II This battery is not compatible with these Nikon cameras: Z8 Zf