I've got a Lenovo ThinkPad X1 Carbon 10th generation, which, from the start, IIRC was criticized for not having the best battery life, I think, because of its processor (12th Gen Intel Core i7-1280P ร 14).
I thought I had read that using a more recent kernel might help the lowish battery life problem (I'm using 6.11.0-24-generic at the moment), but it doesn't seem to help much, if at all.
I tried using tlp, which meant uninstalling power-profiles-daemon, but this just made my laptop run hot, and also screwed up my battery when I tried to set charging thresholds (had to reset it by using the emergency pin hole), so I probably won't be trying that again. Reinstalled power-profiles-daemon, and now have it on power saver; so back to normal now, not running hot, but battery life still isn't great.
Anything else I could try? There's auto-cpufreq which I used for a while on an older laptop, but that was quite a while ago . . .
I was sort of under the impression that tlp was an "install it and leave it if you want" type of thing, but that you could tweak it more to your liking if needed. ๐คทโโ๏ธ Well, in any event it didn't work for me in either case!
Thanks for the suggestions; I might give auto-cpufreq another shot first just because I've used it in the past on another machine, but if that doesn't work, I will definitely take a look at tuned. ๐ Will try to remember to report back with the results, though it may take a while.