1. Turn off Wi-Fi and BlueTooth – Most laptops have shortcut keys to instantly disable wireless networking.
2. Don’t play computer games, music or DVD movies – Multimedia activities drain laptop batteries.
3. Disconnect all external device like PC Card modems, Firewire, USB devices and optical drives. Use the notebook touchpad instead of an external mouse.
4. Adjust your screen brightness – Dimming your display saves battery power.
5. Tweak Windows Power Options – Choose a Laptop power scheme that turns off the notebook monitor and hard disk after 10 minutes of inactivity.
6. Decrease or mute the Laptop Speaker Volume.
7. Turn off all scheduled tasks.
8. Turn off Auto-save features in Microsoft Office and other applications.
9. If your PC has a built-in wireless card, turn it off or disable it when not in use.
10. Programs that are run from a CD or DVD can be copied to and run from the hard drive, which typically consumes less power than an optical drive.
Battery-saving sleep modes: Should I use Stand By or Hibernate ?
Use standby to save power when you will be away from the computer for a short time while working – your monitor and hard disks turn off, all applications and open files are stored in RAM. When you want to use the computer again, it comes out of standby quickly, and your desktop is restored exactly as you left it.
Use hibernation to save power when you will be away from the computer for an extended time while working – your computer shuts down to save power but first saves everything in memory on your hard disk. When you restart the computer, your desktop is restored exactly as you left it.
When you choose Start, Turn Off Computer in Windows XP, your options are Stand By, Turn Off, and Restart. To Hibernate, place the cursor over Stand By, then hold down Shift and click.