How Laptops are Unlike Desktop Computers
Power Supply

Like desktops, laptops can be plugged into the wall to receive AC power through an AC adapter. However, for laptops to be truly portable, battery power is needed. Most laptops use some type of rechargeable battery, such as lithium, nickel-cadmium or nickel-metal hydride. Many laptop computer models are also equipped with power management software to extend battery life

Display Screen

Laptop screen sizes range from 12 to 15 inches. Modern laptop display screens are LCD screens with minimum 800 x 600 pixel resolution.