On r/thinkpad (I think), I at some point read about the AMD powered machines having extraordinary battery life on Linux, to the degree that I regretted my very recent Intel ThinkPad purchase. Maybe that's something to search for. I think it was the new T14.
this post was submitted on 14 Aug 2023
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I have ~1.25hrs of uptime on Windows. Almost the same, if not more, on Arch.
It's really almost the same.
My lenovo yoga slim 7 pro x with a ryzen 6800hs consumed about 6 watts at idle when I used manjaro and i3 with auto-cpufreq. That meant it got around 8 hours of screen on time in the real world and up to 10 if I barely taxed it. Now on fedora with gnome and wayland and no tweaks it also consumes just over 6 watts at idle but we'll we how it pans out. If there are any power tuning tips for gnome/wayland/amd I'd like to hear them. I don't know if auto-cpufreq is still relevent with the newest kernels.
It's around the same for me, altough windows is slightly better when battery saver is activated (hp pavilion 14 with an i7 1255u, windows 11 and fedora 38)
With mine (an Acer Aspire A515 I got for free from where my mom works) I get around 3 hours (according to the time remaining, although in longer use sessions at my desk I usually plug it in every hour or 2, and unplug it when its full), which is about the same as Windows thinks it is. So i would say it gets around the same battery life whether I use Windows or Linux
I'm sporting 8-10h on my Tuxedo Pulse 15 (Gen 1)
At least with AMD my runtime was always pretty good under Linux. Since some years at least. Was on Intel before and always had worse battery life with Linux - most probably because of the additional NVidia GPU, that didn't play nicely with Linux power management
My Dell XPS 13 is 20 minutes long, maybe 30 mins if I don't use it. 4 years old laptop.