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I have the 2014 XPS developer edition and can get 10 hours with modest screen brightness. I get even more if I use a minimal WM like i3. I find the two things

I have the 2014 XPS developer edition and can get 10 hours with modest screen brightness. I get even more if I use a minimal WM like i3. I find the two things that can really eat up the battery are screen brightness and having a poor Wi-Fi connection.

mdellabitta 12y ago
Try running Powertop and check out the tunables pane. You might even be able to reap some additional battery life.