This document lists various accessory equipment for uninterruptible power supply systems that have been tested and listed as complying with UL Standard 1778. It includes battery cabinets, external batteries, transformers, UPS modules, battery disconnect cabinets, external battery packs, bypass switches, optional accessories, power distribution units, UPS systems, and external battery cabinets from various manufacturers. All equipment listed has been tested in accordance with the safety requirements of UL 1778.