Replacing hard wired smoke alarm with battery powered
We have an ancient (1980's?) hard wired smoke alarm in our hall that I want to replace with a new dual sensor battery operated model. We have already added new detectors to each room of course, but this ugly old thing is still up there doing nothing.
I want to remove it, patch the hole and then put up my new battery powered one. There are 2 wires - is it safe to simply turn off breakers to the area, cut the wires and cap off the wires with plastic terminators? Or do these wires need to be disconnected near the box, somehow?