I am working in a setting where we can expect to lose power several times a day and I want to get a UPS (uninterruptible power supply) in order to keep the computers running.
Are there any uninterruptible power supplies which do not emit loud high-pitched screeching sounds every-time that I lose power?
How much time would it take to disassemble the UPS, cut the wires to the speaker, cap the speaker wires with wire nuts, and put the housing back-together?