1) Reduce Brightness
You can reduce the brightness level on your screen and use less power while still having enough visibility to get your work done.
2) Reduce Power Use
You can control usage on many machines.
If you’re typing up notes from a meeting or just need to put something in writing, use a basic text editor such as Notepad instead of Word. wh
4) Remove Extra Devices
Make sure you don’t have any devices plugged in that can drain power.
5) Make Sure You Have The Right Amount of RAM
Refreshing the RAM requires less power than spinning the hard drive, so having the correct amount of RAM means less drain on your laptop battery. You’ll probably need 2 GB or more RAM for the best performance.
Much more here, thanks to Olmec.