I use CachyOS and enabled some serious battery saving techniques:
- https://nowhere.dk/2026/03/hibernation-on-cachyos-with-gnome-grub-btrfs-and-fde/
- https://meganerd.nl/blog/enable-hibernation-in-cachyos-alongside-zram-swap-with-full-disk-encryption-on-btrfs
- https://github.com/wildurbear/CHF
s2idle (although stupid name) is the best option. And also install all the tlp stuff.
Those things together made my machine incredible. (X13 gen3 and a P15 Gen1)