> the detector comes off the ceiling and ends up in a drawer of blankets to dampen the noise as the chirping takes awhile to die after the detector is removed f

> the detector comes off the ceiling and ends up in a drawer of blankets to dampen the noise as the chirping takes awhile to die after the detector is removed from power and battery removed. You can generally hold down the test button to quickly drain the internal capacitance (sometimes with interesting audio effects).