Diablo 4 has been absolutely perfect on the deck once you get battle.net loaded up. Runs awesome, good battery life if you lower the graphics a little and limit FPS.

I have my game locked to 40 fps, using medium settings with FSR set to performance. I get about 3 hours of battery life (if I don’t sit in towns too long). Switching to balanced or quality FSR is also an option, I just use performance for battery life.