Microprocessor-controlled Smart Cell battery packs help provide Matrix-UPS maximum datacenter security. If one battery should fail, the self-diagnosing LED can indicate the failure of an individual Smart Cell. Because Smart Cells are connected in parallel, the failed battery can then be "hot-swapped" out, while the remaining batteries keep the protected system up & running. Swapping batteries out of your Matrix wont happen very often. In fact, while other brands UPSs may require two or three replacements, Smart Cells might need only one during the service life of the unit. These extraordinary batteries last longer because they operate at room temperature. Smart Cells also can be added easily to provide as much runtime as your application requires.