What is the function of a UPS (Uninterruptible Power Supply)?

A UPS (Uninterruptible Power Supply) is designed primarily to provide backup power and battery support during power outages. This functionality is critical for maintaining the operation of electronic devices and preventing data loss during unexpected interruptions in the power supply. When the main power source fails, the UPS instantly switches to internal batteries, ensuring that devices remain powered for a limited time. This allows users to save their work and safely shut down equipment, such as computers and networking hardware, which can help prevent hardware damage and data corruption.

Additionally, while a UPS may offer some level of surge protection, its main purpose is not solely limited to protecting against power surges. It serves as an immediate backup power source, which is essential for any systems that require a constant and reliable power supply. The focus on backup power is why the answer revolves around providing both power support during outages and helping keep systems operational during those critical moments.