I've got a question I cannot seem to locate the answer to, and I've been combing through APC's site all morning. I have a Smart UPS 700 that I "obtained" while I was overseas that is rated for 220-240 ...

For mission critical business systems, UPSes are a critical necessity as a single brown out, power surge or power outage could easily cost thousands of dollars worth of lost time, lost data and ...

My two APC SmartUPSen both buzz while the battery charges. Nothing to worry about, I don't think, it'll stop when the battery is charged.