Standby power, also known as vampire power or phantom load, refers to the electricity consumed by electronic devices and appliances while they are plugged in but not actively in use. Many devices, such as computers, televisions, and chargers, continue to draw small amounts of power even when switched off or in standby mode. This constant energy drain can add up over time, leading to higher electricity bills and unnecessary energy consumption. In cybersecurity, understanding standby power is important when considering the physical security and energy management of devices, as some networked equipment may remain accessible or vulnerable even when not in active use.