An uninterruptible power supply (UPS), also known as a battery backup, provides backup power when your regular power source fails or voltage drops to an unacceptable level. A UPS allows for the safe, orderly shutdown of a computer and connected equipment.A UPS is an effective solution for wireless networking equipment, computers, TVs, gaming consoles, servers and basically anything else that gets plugged into a standard power outlet.
A UPS serves three basic roles: a backup battery, surge protector and power inverter. The backup battery and power inverter supplies power to your connected electronics in the event of a power outage, fluctuation or other disturbance. A UPS also guards against voltage spikes/surges, frequency noise/variation, harmonic distortion, and more, depending on the type of UPS you buy.