The extended runtime lithium-ion battery pack offers a much higher energy density and scalable runtime for Smart-UPS applications. The APC Smart-UPS On-Line lithium-ion battery pack with extended runtime provides flexible rack and tower installation options and has a threefold battery lifespan compared to a VRLA battery. This versatile 2U long-runtime battery is compatible with SRTL 1-3kVA systems and is ideal for critical applications requiring extended runtime in network IT and other applications.