Power dock provides a simplified way of "plugging-in" a laptop computer to common peripherals. Docks are not standardized and are usually designed with a specific make and model of a device in mind, because there are different connectors, power signaling, and uses for a wide range of dockable devices—from mobile telephones to wireless mice.
Some power dock can make some computers to become a substitute for a desktop computer, without sacrificing the mobile computing functionality of the machine. Portable computers can dock and undock hot, cold or standby, depending on the capabilities of the system. In a cold dock or undock, one completely shuts the computer down before docking/undocking. In a hot dock or undock, the computer remains running when docked/undocked.