ranjitbhar
Regular
I have the higher end of the APC UPS called Back-UPS RS series and for that via the software interface you can disable the beeps, it now just beeps once when the power goes and again once the power is back. I can say its one of the best UPS in the market its bit on the expensive side though, have been using it for around 3 years no problems what so ever, also you can add an external batter backup pack if you need that extra backup time, for me with the extra battery pack it gives around 1.1 - 1.3 hrs used to give more than 2 hrs when it was new.I also have that cheap APC one and yeah that beeps like crazy.