And running off a battery means you can use it without a mains power supply. They can be great for those with limited space, because when not in use they can be put away. The downside is that they are prone to mistreatment, are more expensive than similarly equipped desktops, and are not as upgradable or expandable.
Battery Expect to get two to four hours use from a fully charged battery.
Lithium-Ion batteries offer longer life than NiMH or NiCad batteries, and have become the standard. Pointing device Notebooks generally include a trackpoint or trackpad. Trackpoints are buttons between the G and H keys of the keyboard. You push the button in the direction you want the cursor to move. Trackpads sit in front of the keyboard and you move your finger across the surface to move the pointer.