Netbook and UMPC (Ultra Mobile PC) all fall under the category of light and portable computers. Their one remarkable advantages over laptops is that they are lighter (from less tan a kilograms - 2 pounds- up to 2 kilograms -3.4 pounds) and easier to carry around especially for those who need to travel a lot and be up to dated at all time. For the reason explained above, it is obvious that they handle less memory and they are less fancy than laptops or other devices since they have to be able to work as long as possible without causing the problems. In order for the battery to stay charged as much as possible at all times, they have cut all the unnecessary battery-consuming prospectives from these devices such as DVD or CD-Rom. 

The heart of these devices beside the main processor is battery, and even battery life is more of a concern than the properly working of the processor itself among users.

The manufacturers are putting the most advanced technology in battery production process and some new netbooks will run for up to a full business day on a single charge which is a real break through in the world of rechargeable batteries. 

• Make it a point to turn off Wi-Fi and BlueTooth. You are aware that most Netbook/UMPC have shortcut keys to instantly disable wireless networking. 
• Completely avoid playing computer games, music or DVD movies as multimedia activities tend to drain Netbook/UMPC batteries. 
• Disconnect all external devices like PC Card modems, firewire, USB devices and optical drives.
•  It is advisable to use the netbook touchpad instead of an external mouse. 
• It will also help to adjust your screen brightness as dimming your display saves battery power. You'll certainly need to see your screen, but just how bright do you need it to be? Screens lighted at full strength eat up 15 percent more battery life than if your battery was at 50 percent brightness. So, be sure to squeeze more life out of your Netbook/UMPC by reducing the brightness of your monitor a great deal.
• Select a power scheme that turns off the monitor and hard disk after 10 minutes of inactivity.
•  Remember to decrease or mute the speaker volume. 
• Lastly, programs that are run from a CD or DVD can be copied and run from the hard drive, which typically consumes less power than an optical drive.
•  Some games offer you the choice to install to the hard drive, so choose this option, as you will get more life out of your Netbook/UMPC than using the CD-ROM orDVD player, which are massive battery consumers.