Uninterruptible power supply
ELECTRICAL DEVICE THAT USES BATTERIES TO PREVENT A POWER FLOW INTERRUPTION
Uninterruptible Power Supply; UPS (uninterruptible power source); Uninterruptible power supply unit; UPS unit; Standby power system; Uninterrupted Power Supply; Internal ups; Some UPS manufacturers; Uninterruptible power supplies; Uninterruptable power supply; Uninterruptible power source; Battery backup; Battery-backup; Uninterrupted power supply; Back-ups; Back-up power; Continuous power supply; Electricity disruption; Alarm power supply; U.P.S. Systems; Voltage and frequency independent; Uninterruptable power supplies; Backup power supply; No-break
An uninterruptible power supply or uninterruptible power source (UPS) is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries, supercapacitors, or flywheels.