APC Smart-UPS X-Series 48V External Battery Pack Rack/Tower TAA Extended-run battery systems provide flexible runtime to critical Smart-UPS applications. Hot-swappable batteries Ensures clean, uninterrupted power to protected equipment while batteries are being replaced Intelligent battery management Maximizes battery performance, life, and reliability through intelligent, precision charging. Rack/Tower convertible Protects the initial investment in the UPS when migrating from tower to rack-mount environment. Multiple battery pack configuration Connect up to 10 battery packs for extended runtime applications. Advanced battery management included Embedded monitoring at the cell, module, and cabinet level provides a clear picture of battery runtime and health, with the added benefits of predictable, consistent runtime performance and stable cell health.