Smoke Detectors
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Well ... it's actually physics, not design. Battery output varies with temperature, and most houses are coolest between 02:00 and 05:00 (for obvious reasons). As they cool, the battery can't put out as much as it can during the warmer day, and the smoke detector picks this up as an imminent battery failure and starts the "replace me" chirp. Or in our case it talks to you, which at 02:30 is even more disconcerting as it wakes you up and then shuts up so you hear something and don't know what it was ...
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Mine died when I wanted to sell my house ... I come home after multiple showings and 3 of them were chirping! Why then? Why did 3 start at the same time? If multiples fail at the same time, why didn't all of them fail at the same time? Very odd coincidence.
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Mine died when I wanted to sell my house ... I come home after multiple showings and 3 of them were chirping! Why then? Why did 3 start at the same time? If multiples fail at the same time, why didn't all of them fail at the same time? Very odd coincidence.
Probably because you buy batteries in multipacks, like I do. Smoke alarms don't use a lot of power, so it's quite likely that all the batteries will fail at the same time. Generally, if one of mine starts yelling at me, I'll meter the batteries in all of 'em and end up changing them all anyway to avoid the "02:30 wake up call" in a couple of weeks time. Which makes it more likely they will all start yelling at the same time.
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
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My guess is that because they are screaming "change my battery" Wherever you have them is coldest at night. So that's when the battery finally dips below allowable threshold.
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Similarly, I used to say that a wireless mouse/keyboard's batteries always die an at inconvenient time. Until I realized there's no such thing as "a convenient time" at which a battery could die.
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Mine died when I wanted to sell my house ... I come home after multiple showings and 3 of them were chirping! Why then? Why did 3 start at the same time? If multiples fail at the same time, why didn't all of them fail at the same time? Very odd coincidence.
Pualee wrote:
I come home after multiple showings and 3 of them were chirping!
Some are wired together so that if one goes off, they all go off. Unfortunately, it makes it impossible to figure out which one needs the battery replaced.
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:laugh: :laugh: :thumbsup:
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smoke detectors? We don't need smoke detectors.
If you can keep your head while those about you are losing theirs, perhaps you don't understand the situation.
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If you are in the UK they should be mains wired
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I'm in Canada, and I'm not aware that I'm required to have smoke detectors at all in my residence, but I do get a break on my home-owners insurance for having them. I think maybe new builds are required to have wired detectors, but my house dates from the 60s, so it would require a retrofit in any case. Are you saying that a 15th C cottage in the UK needs to be retrofitted with mains wired smoke detectors? My battery operated smoke detectors have a sticker saying "replace in 2020", at which point I'm guessing the smoke-detecting ability has degraded beyond any usefulness. Assuming that wired-in detectors have the same issue, do you have a replaceable detection unit, or do you need to wire-in a new unit? Either way, will they start chirping in the middle of the night to let you know that the detector needs replacing?
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Mine died when I wanted to sell my house ... I come home after multiple showings and 3 of them were chirping! Why then? Why did 3 start at the same time? If multiples fail at the same time, why didn't all of them fail at the same time? Very odd coincidence.
Did the ghosts follow you to your new house, as well?
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This is a huge coincidence, but just last night I went to bed and I noticed the small light from the smoke detector (it's there, but I'm not very aware of it) and I thought to myself "That's been hanging there for years, when's the battery going to run out? Probably somewhere in the dead of night..." I've slept through smoke alarms in the past (luckily just my dad testing the alarm) :laugh: I'm about 10 years older now, so I'm not sure if I'd still sleep through it... Stress makes you sleep lighter :sigh:
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you could mod and use your wireless mouse on a phone charging pad.
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go for the zero power option: hang up some whistling kettles instead.
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If you are in the UK they should be mains wired
We can’t stop here, this is bat country - Hunter S Thompson RIP
