A UPS or uninterruptible power supply provides a continuous power supply or a battery backup. This device maintains continuous supply of electric power to any connected equipment by supplying power from a separate source when utility power is unavailable. A UPS is different from an auxiliary power supply or a standby generator. An auxiliary or a standby generator does not provide instant protection from a momentary power interruption. However, with the UPS, it can be used to provide power that is uninterrupted to equipment for a specific amount of time based on load requirements until generator comes online or utility power is restored. It is typically used to protect computers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption or data loss.