APC SU48R3XLBP Smart-UPS 48V RM 3U External Battery Pack ENCLOSURE 3U RBC27
Batteries are NOT included. Requires a total of 16 12-VDC batteries type RBC27. 8 batteries per cartridge. Overall dimensions: 25.70 x 17.50 x 5.25 (3U) -- 48 LBS This UPS requires a special battery designed for the voltage of the UPS which may use a special connector.