An uninterruptible power supply, or UPS (typically pronounced “upps” but also pronounced as the letters U, P, and S), is a fancy name for a battery that’s plugged into the wall and you plug all your stuff into it. When the power goes out, the UPS is designed to maintain steady power delivery to all of the devices connected to it. A lot of times the UPS will come with an interface designed to safely shut down all the connected devices in the event of a power failure. A good UPS will also have a built-in surge suppressor designed to remove “transient voltages” (aka power spikes or power surges) that occur for whatever reason. This protects the electronics that are plugged into the UPS from damage that these transient voltages can cause.