Hi, I am using Asus U36JC which has Windows 7 Home Premium pre-installed. Asus has its special technology called Super Hybrid Engine which allows my laptop to run up to 9 hours in battery per charge. I tried to install quite a few of lightweight linux distributions such as WattOS, Xubuntu, Bodhi etc. but none of them could offer such high level of capacity. Does any distro has similar solution like Super Hybrid Engine at this stage? Thank you.

Asus U36JC is another 'optimus' laptop from what I can see.

nVidia doesnt support optimus with linux, so not only do you use more power to display accelerated video on the intel controller, the nVidia GPU just sits there eating power and creating heat.

There is a setup giude here-

http://ubuntuforums.org/showthread.php?t=1705406

That should help yuo with disabling the nVidia GPU, and a few others bits and pieces.

Thank you so much. I will try it right now.

there is also a laptop package called laptop-mode
http://samwel.tk/laptop_mode/

it's highly configurable and can be very aggressive when you go into battery mode
it takes care of cpu stepping and hard disk head activity and spin down and so on
you get a directory called /etc/laptop-mode for hour of adjusting
it can kill tasks
disable services
stop HAL polling
controll wifi power saving mode
reduce brightness
disable video out
power down some USB ports
on and on

some of the developers have started trying to get gpu switching working
https://github.com/awilliam/asus-swi.../master/README

too bad no fancy proprietary drivers like for ATI switching

if you try to do switching remember you have to restart x (remember how windows 7 would blink a few times)