Ayex D850 To Nikon Ax-D850 Battery Grip Mb-D18D850 for Nikon MB D18 Equivalent Ayex battery grip D850 for Nikon MB D18 counterpart AX D850 battery grip our product is suitable for Nikon D850 model; compatible with Nikon D850 running our product model AX D850, two times longer battery life along with an ergonomic design, as well as easy access to the camera functions for vertical images, and easy machine control thanks to the user more comfortable and allows you to shoot faster. function keys