APC XBP48RM2U-LI, Lithium-Ion (Li-Ion), 48 V, 50 Ah, 1 pc(s), Black, Silver, 59.5 lbs (27 kg) APC XBP48RM2U-LI. Battery technology: Lithium-Ion (Li-Ion), Battery voltage: 48 V, Battery capacity: 50 Ah. Weight: 59.5 lbs (27 kg), Width: 17" (432 mm), Height: 3.37" (85.5 mm). Package width: 21.9" (555 mm), Package height: 9.17" (233 mm), Package depth: 29" (737 mm). Warranty period: 5 year(s)