what ups

An uninterruptible power supply (UPS) is a device that provides backup power in the event of a utility failure, allowing connected equipment to continue running for a short time. It is commonly used to protect hardware such as computers, data centers, and telecommunication equipment from unexpected power disruptions that could cause injuries, fatalities, business disruption, or data loss. UPS units range in size from those designed for a single computer to large units powering entire data centers or buildings. There are different types of UPS, with the most commonly used type being the full-time or full double conversion UPS, which provides an "electrical firewall" between the incoming utility power and sensitive electronic equipment. Online UPSs are the optimal choice for mission-critical applications or those involving highly sensitive equipment, such as data centers and communications hubs. When the flow of electricity drops to an inadequate voltage or a complete outage occurs, the UPS immediately switches to battery power to provide a continuous power source for a period of time ranging from minutes to hours.