Configurations

These quick changes increased my battery life from 5-6 hours to well over 10 hours with a Thinkpad X250.  I would highly recommend these for any mobile Ubuntu install.

sudo add-apt-repository ppa:linrunner/tlp

sudo apt-get update

sudo apt-get install tlp tlp-rdw

(For thinkpads continue with)

sudo apt-get install tp-smapi-dkms acpitool

Now update your TLP file with

gksudo gedit /etc/default/tlp

Finally Add Powertop

sudo apt-get install powertop

sudo powertop --auto-tune

sudo powertop

Reboot