To stop the beeping that an uninterruptible power supply loses an ac connection and connects the batteries ? I have an old one I use for my shortwave and would like to use the battery, but don't want to listen to the beep . TIA

All life all holiness come from you O Lord
Brio

I don't want to listen to the beep .
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I wanted to silence a modem and used an old piece of sticky-sided
Velcro. I stuck it over the hole of the transducer and it quieted
nicely so I could just hear it. It is still sticking four years later.