Nikon Z 8 Reference Manual page 883

2
Plug the EH‑7P or EH‑8P into a household power outlet.
The shape of the plug varies with the country or region of purchase.
3
To begin the supply of power to the camera, turn the camera on and select [ON] for [USB
power delivery] in the setup menu.
4
To end the supply of power to the camera, unplug the EH‑7P or EH‑8P and disconnect it
from the MB-N12.
EH-7P
883
Optional MB-N12 Power Battery Packs
EH‑8P