1. Make Your Own Power Plan
Windows laptops include a few preset power plans for maximizing battery life, but you can also customize your operating system's power-management features (in Windows XP, under Power Options in the Control Panel; in Vista, under Mobile PC in the Control Panel and in Windows 7; just type "power settings" into the search bar in the Start Menu and hit Enter). Setting aggressive targets for when the display turns off and when the machine goes into sleep or hibernate mode will help your battery last longer.
2. Limit Your Connection
When you aren't actively using your notebook's Wi-Fi, Bluetooth, or other wireless connections, turn the radios off (via the hard switch, if your PC has one, or using the appropriate utility), so they don't run down the battery while they keep searching for a signal. Also, use USB-attached devices sparingly while you're mobile.
3. Dim the display
A laptop's biggest battery-life-sucking component is its LCD display. To eke out more juice when you're off the plug, turn down your panel's brightness to the lowest level your eyes can stand. Most notebooks have a Function key combo—or even a dedicated hot key—for a quick crank-down. (You can also adjust brightness in Display Settings under Control Panel.)
4. Back Up Everything
Constant movement puts computer components at risk, and because of their portability, laptops suffer a lot more wear and tear than desktops. All of that on-the-go use increases the risk of hard drive failure, so make sure you back up the data on your laptop to an external hard drive, thumb drive, or home server on a regular basis.
5. Cover Your Keyboard
Keep liquids away from laptops at all times. That rule often gets broken, of course, and accidents happen. Should that accident end up on your laptop's keyboard, however, you could end up with more than just a mess: Liquids that seep through your notebook's keys can fry its components.
6. Buy a Bag!
If you plan to carry your notebook with you, the most useful accessory you can buy is a laptop bag.
Best Regards.
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