A mini-tower UPS with line interactive topology, the CyberPower PFC Sinewave CP850PFCLCD provides battery backup, power protection (using sine wave output), and surge protection for desktop computers, workstations, networking devices, and home entertainment systems requiring active PFC power source compatibility. The CP850PFCLCD uses Automatic Voltage Regulation (AVR) to correct minor power fluctuations without switching to battery power, which extends battery life. AVR is essential in areas where power fluctuations occur frequently.