Just published a detailed write-up on tuning a ThinkPad T480 for power efficiency under FreeBSD 15.0-BETA5.
Achieving 6–8 hours of battery life with full suspend/resume, ZFS, Wi‑Fi, and XFCE.
Read here → https://codeberg.org/Larvitz/gists/src/branch/main/2025/20251109-T480_FreeBSD_Laptop_Efficiency.md
The article about FreeBSD optimization on ThinkPad T480 is of course also on my Gemini capsule: