Eaton Powerware 3S UPS Product Support Brochure Manual Contact Sales Rep   The new Powerware 3S UPS delivers efficient, energy saving battery backup for your home and office equipment.  With battery protection for multiple devices and data line protection, the 3S UPS is an ideal solution to provide backup power for wireless phones, small office PBX or key phone systems, home office workstations, small office desktop servers, small network nodes, point-of-sale systems, and computer peripheral devices.