Office Depot offers the APC Back-UPS 650VA UPS Battery Backup, model no. BE650G, for $54.95 with free shipping. That’s tied with our March mention and the lowest total price we could find by $23. Sales tax is added where applicable. This 8-outlet device features modem/fax and coax protection, as well as up to 3.8 minutes of backup time at 650VA/390 watts.