APC Smart-UPS XL protects your data by supplying reliable, network-grade power & scalable runtime in tower or rack-mount form factors. Customers can configure up to 10 matching battery packs for runtimes exceeding 24 hours, if needed. Typical applications requiring longer runtime include critical application servers & storage, IP & PBX based voice networks, & enterprise network switches & hubs. Included Power Chute management software provides IT administrators the comfort of safe system shutdown & advanced UPS management. Additional manageability is available through the Smart Slot, an internal accessory slot that allows installation of optional accessories to enhance performance. Engineered with the same standards as the award-winning Smart-UPS, the Smart-UPS XL adds the advantage of unsurpassed runtime capability for those business applications that demand continual uptime.