Nope, it's not critical. UPS stands for Uninterruptable Power Supply. It's
equipment that switches from the well plug to battery power if your power
should go out. Have a look at apc.com if you're curious at all.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.