APC SRYLRMXBP Smart-UPS External Battery Pack | Rackmount, Lithium Ion

Add more runtime where standard UPS capacity is not enough. The APC Smart-UPS Modular Ultra External Battery Pack, MPN SRYLRMXBP, is built for environments that need longer ride-through during outages, transfer events, or controlled shutdowns. Its rackmount lithium-ion design supports a compact footprint while adding the battery capacity required for higher-value infrastructure. With four battery modules, this external pack is suited to modular power architectures that need scalable backup energy without moving to a larger standalone UPS. That makes it a strong fit for server rooms, network edge racks, and distributed systems where uptime targets are strict and space is limited. Lithium-ion construction also aligns with modern power rooms that prioritize service efficiency and reduced maintenance overhead compared with older battery chemistries. For teams standardizing on APC Smart-UPS platforms, SRYLRMXBP helps preserve continuity for storage, networking, and compute loads that cannot drop unexpectedly. It is the kind of accessory that justifies itself in the first outage: more runtime, better control, and a cleaner path to keeping critical systems online long enough for generators to start or shutdown procedures to complete.