Uninterruptible power supply (UPS)
A UPS is an emergency power device for your computer.
It supplies electricity when there is a mains fault such as voltage or frequency fluctuations, or a sudden power cut. UPS units have a battery that delivers power immediately when mains power fails. They can supply power for 10–20 minutes while the supply is restored or until connected equipment is shut down safely. This gives you the chance to avoid losing valuable information and data.
