Power Saver in Ubuntu

After I move to ubuntu 13.10 from windows 7
I have some problem
one of them is power saver in ubuntu
If my windows can stay 3 hour with battery only then my ubuntu only 1 hour

One of my friends tell me to install power top
it is a software for linux to save your power

sudo apt-get install powertop

And run in terminal

sudo powertop

you can choose which process you want to save