Protect critical rack power with the APC SRTL50RMBP1U-LI lithium battery pack, designed for Smart-UPS Ultra 1U deployments. In dense infrastructure, battery replacement has to be fast, predictable, and space-efficient. This 1U rack-mount battery pack supports that requirement with a compact footprint suited to modern server rooms, edge sites, and distributed IT closets where every rack unit counts. Lithium battery technology helps align runtime support with the operational demands of high-value equipment, while the rack-mounted design keeps the installation clean and service-friendly. For teams responsible for maintaining uptime across branch offices, network closets, and compact data center rows, a dedicated battery pack for the Smart-UPS Ultra platform provides a direct path to restore protection without redesigning the power stack. This is the kind of component that earns its place in a premium infrastructure environment: purpose-built compatibility, efficient use of rack space, and a form factor that fits the realities of modern IT operations. When the cost of downtime is measured in business interruption, a matched replacement battery pack is a practical investment in continuity.