Additional Batter pack to increase runtime of compatible UPS Scalable runtime - Allows additional run time to be quickly added as needed. Hot-swappable batteries - Ensures clean, uninterrupted power to protected equipment while batteries are being replaced Rack/Tower convertible - Protects the initial investment in the UPS when migrating from tower to rack-mount environment. User-replaceable batteries - Increases availability by allowing a trained user to perform upgrades and replacements of the batteries reducing Mean Time to Repair (MTTR) Intelligent battery management - Maximizes battery performance, life, and reliability through intelligent, precision charging. Models Supported SMX2000RMLV2U, SMX2200RMHV2U, SMX2200RMLV2U, SMX3000RMHV2U, SMX3000RMHV2UNC, SMX3000RMLV2U, SMX3000RMLV2UNC