Just getting started with holy grail approach taking tons of pictures and going through batteries. Using Nikon D850 and Nikon Z9. Looking for help in best settings when using Pro Timer 3 to minimize battery drain.

Turn off Monitor, Liveview, EVF. That's it. Then you should be able to shoot thousands of images with one battery. Especially with the Z 9. The Z 9 can also be powered by a USB C Power Bank.