Many people use an Uninterruptable Power Supply (UPS) battery back-up power unit for their computer — basically a UPS is a battery that provides power when the AC from the wall is cut. With a UPS there’s enough time to save your work and gently turn everything off if you lose power. Many UPSs provide other features as well, such as power filtering, over-voltage protection, voltage regulation, and more. We consider a UPS to be essential for our computers. A UPS can be just as valuable, however, for your musical gear.
Not all power outages last very long; a “brown out” or temporary voltage drop may last for only a moment, but that could be long enough to force a shutdown of your electronic equipment. Having a UPS providing backup power for everything means that your gear can weather short disruptions without issue. And for longer disruptions, if you use digital gear, the extra time will let you save your presets, patterns, or other work. If you have tube amps, a UPS will give you time to put the amp in standby and then turn it off, which is safer.
Depending on how you have things set up, you may not need to run everything off of a UPS — certainly anything sensitive to voltage fluctuation or power interruptions or that you may need to save your work on should be connected to one — keyboards, computers, digital recorders, digital effects, modelers, interfaces, and much more. Be sure to choose a UPS that will provide enough VA (volt-amps) for the amount of equipment you need to connect.