Most of us have been, or will be in the position, when you are ready to use your notebook and get some work done, that you find your battery is fizzling out faster than your fingers can type. Here are a few simple tips to help preserve your notebooks battery life as long as possible.
Catch a few zzzzs
Use the operating systems power management features to set targets for when the display will go dark (say, after five minutes of no action) and when the machine will slip into sleep mode (no longer than ten minutes of no action). And if you can spare the extra time it takes for the machine to resume, set the PC to hibernate, not just sleep, when you close the lid
Dont be a power mogul
Select the "Power saver" option to extend battery life when on DC power, and leave the 3D gaming for when you're near an AC outlet.
Blinded by the light
Turn down the brightness of the LCD panel to the lowest level you can tolerate, without needing an Optometrist. The backlight uses an enormous amount of unnecessary power.
Banish non-essential components
When you aren't actively using the Wi-Fi, IR radios and bluetooth, turn them off (via the hard switch, if your PC has it, or in the appropriate utility set), so they don't trickle your power supply dry trying to connect. Also, use USB-attached devices only when absolutely necessary
Be sure that your periodic virus scanner is set to a time when you're usually plugged in. Running a full-disk virus check keeps the hard drive and CPU fully engaged for the better part of an hour