I have a First Alert smoke detector which was purchased earlier this year. Can’t find the manual. I just replaced the 9 volt battery with a brand new battery from a sealed package
(Panasonic alkaline plus 9V – number on the bottom says 01 2014) and the detector is still making that noise it makes when the battery is about to die.

Earlier this year I believe somebody posted a site that provides manuals for lots of smoke detectors. It also provides pictures of the detectors in case you don’t know what the model number is. If anybody knows what that site is, could you please post it again?

I suppose the battery could be bad. Any other thoughts?

I’m sure this is not your problem but we had a funny thing happen about our smoke alarm. We kept hearing beeping even after the battery was changed. Son changed the battery again and we still heard beeping. I bought a new smoke alarm, still heard beeping. Finally we realized it was the carbon monoxide detector, also in the hallway. Another ‘duh’ moment.

I just went through this myself. After replacing the battery, the detector was still chirping. I went online to see if I could find a manual, which I did. The manual was in a pdf format, so I saved it to my hard drive in case I need to refer to it later.

I followed the directions in the manual for battery replacement and the chirping stopped on that particular smoke alarm. However, the one upstairs had started chirping (which explains why the chirps sounded like they were closer together rather than 45 seconds apart). I thought it sounded odd that the batteries in both detectors would go out on the same day, but I believe I read something in the manual that said the Kidde detectors are wireless capable, meaning that they can sync up to each other. In other words, when one detects smoke and starts the alarm, the others will chime in, alerting everyone in the house. It would make sense, unless I read or understood that incorrectly.

according to the age of your house and your location, National Electrical Code requires connecting the detectors together, so as to alert everyone that one detector sensed smoke. if the detectors were installed about the same time, from the same batch, the batteries would fail at about the same time; make a habit of changing ALL of your detector batteries yearly. The cost is minimal compared to someone getting hurt for the cost of a 9-volt battery!