Increasing Laptop Battery Hours in Ubuntu 14.04
TLP is a free power management tool, useful for Linux laptops.
Copy paste below 4 commands one by one in terminal and press enter after each
sudo add-apt-repository ppa:linrunner/tlp
sudo apt-get update
sudo apt-get install tlp tlp-rdw
sudo tlp start
See below link for more information / thinkpad specific installation.
Reduce default screen Brightness in Ubuntu
Every time Ubuntu boots up you get the maximum level of screen brightness. This can be overcome by adding a startup script which will automatically adjust screen brightness when Ubuntu boots up .
See below link to set default screen brightness from 100 % to 0 % (or desired brightness level)