The unit powers on once it is unplugged and has output at the terminals, it stays on for a few minutes,. However, I am unsure about the condition of the batteries—they may need to be replaced soonThe price reflects the current condition.Sold as is, with no returns. Free local pickup or delivery available within 30 miles after purchase.Note this is a very heavy unit, about 60 Lb.The Minuteman Endeavor ED2000RTXL2U 2000VA Tower/Rack/Wall Mountable UPS is a reliable and efficient uninterruptible power supply system designed for computer systems, servers, and networking equipment. Made in the United States, this UPS offers protection against power outages, brownouts, and other power disturbances. With its tower, rack, and wall-mountable design, it offers flexibility in how it is installed to suit the needs of various work environments. This model is equipped with a California Prop 65 Warning for safety consideration related to cancer and reproductive harm.