ChargeAll: A portable battery pack with a 120V AC wall plug outlet, so you can power all your things - ExtremeTech
APC Back-UPS 900VA 9-Outlet/1-USB Battery Back-Up and Surge Protector Black BVN900M1 - Best Buy
Universal Portable Outlet CPAP Battery | CPAP.com
APC APC BackUPS 6 Outlets 450VA 255W 6-Outlet 180 Joules 255-Watt 450va AC Surge Protector with Battery Backup in the Surge Protectors department at Lowes.com
APC Back-UPS Pro 1500VA 10-Outlet/2-USB Battery Back-Up and Surge Protector Black BN1500M2 - Best Buy