I have 9 smoke detectors in my home, 3 of which are in the attic (crawlspace) and only accessible with great difficulty. The system is wired as interconnected, so if any unit triggers all units sound. They're all old and due for replacement, but don't contain backup batteries like modern units.
I don't mind changing batteries downstairs, where all I need is a step stool. But I'm looking for a solution for those 3 attic units. Lithium batteries will give me 3-5 years between battery changes (or so I've read). But I was wondering about a "permanent" solution using the 110 VAC available at each unit and running it through a FWR with a cap to replace the battery. Those two components could easily fit inside the detector housing.
So my question is this ... just how flat does the 9 VDC input need to be for a smoke detector? I'm guessing that if a FWR and cap work to power a laptop, it should suffice for a smoke detector. Feedback appreciated, thanks.
I don't mind changing batteries downstairs, where all I need is a step stool. But I'm looking for a solution for those 3 attic units. Lithium batteries will give me 3-5 years between battery changes (or so I've read). But I was wondering about a "permanent" solution using the 110 VAC available at each unit and running it through a FWR with a cap to replace the battery. Those two components could easily fit inside the detector housing.
So my question is this ... just how flat does the 9 VDC input need to be for a smoke detector? I'm guessing that if a FWR and cap work to power a laptop, it should suffice for a smoke detector. Feedback appreciated, thanks.