The Vertiv Liebert GXT5-EBC384VRT6U is an external hot-swappable, lead-acid UPS battery cabinet designed for use with these UPS models: Liebert GXT5-16KIRT9UXLE and Liebert GXT5-20KIRT9UXLE. Its new auto detection feature makes installation easy and fast ensuring the UPS configuration is complete and accurate. Users can connect to up to 10 external battery cabinets to a single UPS for extended runtime.