Looking to go to 10fps? Not EN-EL18, but EN-EL15a, the battery that comes with the D850. I couldn't afford a Nikon grip after spending $3500 on the camera and ended up with a Meike grip thinking I would eventually replace it with a Nikon grip. On close inspection, it is identical to the Nikon grip in fit in finish (I am comparing to a Nikon grip I have on my D500). It's obvious they directly copied the Nikon design right down to the texture of covering. The buttons and rotary switches feel very much like Nikon buttons and switches. The Meike grip came with a wireless remote trigger that works very well. So far, I'm pleased with it and don't plan on moving to the Nikon grip. Will probably get the speed boost from a Z7 II when they become widely available.