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Re:Ask HN: New ThinkPad battery life on Ubuntu by gigatexal on Monday October 16, 2023 @02:15PM (#37903845)
I used this for my work issued thinkpad and it was awesome: https://linrunner.de/tlp/index.html
Re:Ask HN: New ThinkPad battery life on Ubuntu by abdullahkhalids on Monday October 16, 2023 @03:45PM (#37905328)
Please use TLP if you are using linux on thinkpads. You will have to set some options, but you will get a huge boost in battery life.

Even on my old T440s, for several years, I could eek out over 12 hours of work on a single charge.