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

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.