I have a framework. Battery life varies between 2 (physics simulation + opengl rendering), 3 (zoom meetings on Wayland), 5 (netflix on firefox), 7 (local streaming with mpv), 8 (casual browsing with an adblocker), and 12 (coding/reading in a TUI) hours.

Note, I use sway but don't notice much of a battery difference on gnome or plasma.