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> I wonder if it would improve battery life.

Compared to what? If Windows, then absolutely. Any Linux- or FreeBSD-based operating system will make your laptop seem like it's brand new in comparison.

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In my experience with recent thinkpads, my battery life never really beats the w10 install it comes with. Not sure if there are some very clever windows-only optimizations or what, but that's what I've noticed.

When my X270 was new I could get about >20 hours of battery life out of it on Linux with programming and light web browsing (e.g. Hacker News, etc.) It's a bit less now that the batteries have worn a bit, but the other day I accidentaly forgot to turn on the power socket while working all day and I didn't even notice until the next day.

I never tried Windows 10 (although I'm kind of curious now), but I think this is pretty impressive, and at these kind of levels a bit extra battery life is still nice, but hardly critical.

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