An Uninterruptible Power Supply (UPS) is a device that sits between a power supply (e.g., wall outlet) and a device (e.g., computer) to prevent undesired features of the power source (outages, sags, surges, bad harmonics, etc.) from adversely affecting the performance of the device. A UPS provides a conditioned and reliable source of power to your electronic equipment when the main power source fails. The better units protect against surges and spikes in the power source, and they provide a continuing source of battery power.
