Unplanned data center outages present a difficult and costly challenge for organizations. While eliminating downtime altogether is a challenging undertaking, organizations can start with the most frequent cause of unplanned outages – uninterruptible power supply (UPS) battery failure. In most cases, the ability to keep critical systems running through power outages is dependent on the UPS. Batteries are one of the most “low-tech” components supporting today’s mission-critical data centers but they are the most vulnerable part of an UPS system. A single bad battery cell can cripple a data center’s entire backup system, particularly if adequate UPS redundancy has not been implemented.