[bengalister]

I managed to have the same battery life if not better than on Windows 11.

I own a 3 years old Dell XPS 13, i7 16GB of RAM and run it on the latest Fedora (arch btw before). It is a personal laptop, I mainly use it to browse the web and occasionally work on personal projects (Python,Typescript,Rust), mostly on neovim, vscode otherwise.

For power management, I use TLP instead and also disabled power-profiles-daemon (I don´t know autocpufreq).

The key point especially for my usage was to enable as much as possible video hardware acceleration for every app especially the browser (firefox for me). Archwiki is your friend for that. Also for intel graphics you should make sure that the graphics micro controller is used (Guc) for media decoding. It is also well explained on the intel graphics Archwiki page (guc/huc firemare loading).