BRK Electronics FG250RV-48B UL Smoke Detector

This was to replace a similar item in my RV. The "old" one (made in 2012), would periodically give the low-battery "chirp" even with new batteries. It was the same hole configuration as my old one. Just loosened the screws, twisted the old one off, put the new one up and tightened the two mounting screws. I noticed the old one was not the "RV" model. Maybe this one can tolerate the environment while in storage.

Did not work

Performs as expected.