Extending your laptop battery life on Linux

Phoronix has an interesting article on using PowerTOP from Intel and your graphics card control-panel utility to extend the battery-power lifespan. PowerTOP analyzes the system it runs on, and from the results, it recommends and even configures the system-changes and power consumption features needed to utilize the battery-capacity in an optimized fashion, like avoiding idle wake-up calls in hardware and such.

http://www.phoronix.com/scan.php?page=article&item=ubuntu_battery_life&num=1

My notebook's battery has already seen it's last days. But I'll be buying a new one soon, and then I'll be experimenting with this to see if I can extend beyond the 2 hours specified in the manual (that is to say: running the machine with Windows XP with all features turned on).