re: Low battery alert from smoke detector at 1:45am

quote:

---

Temperatures at night are cooler, less movement in the house, less electronics and frequencies in constant use, the air itself is more still(no walking, no doors opening and closing, things moving etc). It’s a chem reaction within the battery when it’s on the lower end of life and there’s no stimulation, it chirps.

---

First sentence is correct. Lower temps and lower humidity will have a battery that’s borderline bad drop into the dying stages(as the detector is looking for) and chirps.