Newell Battery Grip MB-N10 for Nikon. Compatible with Cameras:

The Newell MB-N10 is a robust, fully functional battery grip for Nikon Z5, Z6, Z7, Z6II, Z7II cameras. This device allows you to hold the camera better, improves the comfort of use when taking pictures vertically and prolongs work without changing the batteries in the camera.
Additional power supply
Improved ergonomics
Increased functionality
USB-C socket for battery charging
Grip on/off switch