APC Smart-UPS Ultra On-Line Lithium-ion XBP 180V 2U Rack/Tower (SRTL180RM2UBP) This product is part of the Smart-UPS battery systems, providing extended runtime to SRTL 5KVA mission critical applications. This extendable-run battery pack provides extended runtime during prolonged power outages. Embedded BMS monitoring at the cell, module, and cabinet level provides data of battery SOC and health. Ideal for Smart-UPS on-line mission critical applications.