For a wired + battery backup Smoke Alarm, is there any reason to replace one that appears to be working? I.e just getting to replace a battery in one, and it has a sticker saying "Replace Alarm before 2016" on it. Is that potentially something to do with the radioactive element decaying?
Apparently smoke alarms fail over time, nearly all of them after 30 years about a third after 10 years.
I've got 10 that need replacing next year, 3 hard wired. Massive PITA since I can't seem to find direct replacements so could be into patching holes in ceilings etc.
For a wired + battery backup Smoke Alarm, is there any reason to replace one that appears to be working? I.e just getting to replace a battery in one, and it has a sticker saying "Replace Alarm before 2016" on it. Is that potentially something to do with the radioactive element decaying?