The 2000VA UPS-2000-OL 3U Stand-Alone Online Battery Backup from SURGEX provides power backup to keep equipment running, and properly shut down critical systems, in the event of a power outage. For critical systems that require online battery backup, it delivers network-grade power through double-conversion technology. The UPS offers stand-alone backup solution for sensitive audio-video systems, critical business servers, point-of-sale equipment, telephones, and data network equipment that demand prolonged runtimes of 1.5 hours, or longer. It provides extended scalable runtimes of up to 18 hours, via self-charging extended battery packs, and replaceable battery trays.