Get a Grip. The Nikon MB-N12 Battery Grip can hold two EN-EL15 batteries with hot swappable capabilities, and is designed specifically to accessorize your Nikon Z8 camera. This grip incorporates function buttons, second shutter release, dials, and a USB-C port for charging or tethering the camera to other equipment. When using this unit, the batteries last about 1.8x longer, and can even be charged while inside the device, even if it isn’t attach to the camera.