Power Supply

Example: "The computer would not start up because it had a bad power supply."

A power supply is a component that regulates and provides power to an electrical device. It receives power from a wall outlet, battery pack, or other electrical source and converts the current and voltage to the correct amount required by the connected device. Most computers have internal power supplies, while other devices may use external power supplies that are attached directly to the power cable.

Updated: February 3, 2009

Definition from the PC Glossary