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

Linux Distro of Choice (GNOME Ubuntu 16.04) – best home desktop experience on Linux today. Competes with LinuxMint, but without all the mintyness.
http://cdimage.ubuntu.com/ubuntu-gnome/daily-live/pending/
Windows Distro of Choice: Windows 10 Enterprise, Available with FreeBiz Spark MSDN Access
Mac Distro of Choice : Hackintosh 10.11.4 / Clover Bootloader
What’s your daily driver?