An Uninterruptible Power Supply (UPS) is a device that provides backup power to electronic equipment during a power outage. It contains a battery that kicks in when the main power source fails, allowing devices to continue operating for a limited time. This is especially important for computers, servers, and medical equipment, where sudden power loss can lead to data loss or equipment damage. In addition to backup power, a UPS also offers surge protection, helping to safeguard devices from voltage spikes. By ensuring a steady power supply, a UPS can help maintain productivity and protect sensitive electronics from potential harm during electrical disturbances.