A power plan, also referred to as a power scheme or power management plan, is a configurable set of hardware and system settings on a computer or device that dictates how it manages power consumption and energy usage. These settings allow users to customize their device’s behavior, optimizing the balance between performance and energy efficiency. Power plans typically include options for processor performance, display brightness, sleep and hibernate settings, hard disk and screen turn-off times, USB device power management, and wireless adapter settings. Users can choose from predefined power plans or create custom ones to suit their specific needs, ensuring efficient power usage based on usage scenarios and preferences.