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Re:Neighbor's house alarm triggers when I put my car in reverse by mdip on Sunday December 17, 2017 @10:12PM (#15949124)
Off topic to the discussion, but you hit on something that struck a nerve with me so I'm going to go with it . . .

Oh good God, this happens to me every time one of my smoke alarm batteries starts to go. I have 6 smoke detectors and an older home where they're not all wired/battery back-up but rather all battery powered.

The "chirp at 90 second interval" thing is the worst design in the universe and it bites me every time. If I didn't know any better -- since there is no clock device and these things are not networked in any way -- I'd swear they are also programmed to only start chirping between the hours of 2:00 AM and 4:00 AM. I've lived here 10 years. I have never had one of these fail in the morning, middle of the day or afternoon; only in the middle of the night. Hunting down the one of the six devices that is failing with its way-too-infrequent chirp that's so high-pitched, only a dog could figure out where it's coming from, is made extra fun when you're in the fantastic mood that being awoken from a pleasant dream in the middle of the night and have the joy of hunting it down in your boxers in a cold house.

How much more complicated would it have been to also include a visual indicator. The things have an LED on them that continues to blink as the battery dies. Why not also have it either stop blinking (to conserve battery) or blink faster -- anything to make it easier to identify which of the infernal, identical, devices is in need of a 9-volt.

Thankfully, they're due for replacement this year. Now I have to research which of the models that are available handle this circumstance with a little more intelligence (that don't cost a hundred bucks a pop). This is such an easy-to-solve problem -- I don't want a "smart smoke detector", I want a $25 one that A) detects smoke and B) reports when it needs other attention in a way that is useful. Heck, I'd pay an extra $10 for the latter feature even knowing it would cost them no more than the "dumb chirp" method.

There was a very bad house fire a few miles from me about a year ago and the person who lived there died in their sleep while the fire raged. The rumor was that the home had a bunch of smoke detectors without batteries in it and it was spread through our neighborhood as a "cautionary tale". I'm willing to bet there's a story of being woken up in the middle of the night for a battery change chirp in there somewhere.

Re:Neighbor's house alarm triggers when I put my car in reverse by amenghra on Sunday December 17, 2017 @10:36PM (#15949208)
When the battery is weak, fire alarms have a tendency to chirp in the middle of the night because lowered temperature affects the battery negatively.
Re:Neighbor's house alarm triggers when I put my car in reverse by isoprophlex on Monday December 18, 2017 @12:27AM (#15949639)
Your observation of the unhappy timing is probably related to the temperature. Cold batteries have lower voltage across their terminals, triggering the chirp.

(You can troll people into thinking you have magical powers, rub the batteries of a just-failing calculator/scale/wristwatch in your hands and you'll get another ten minutes of use out of them)

Re:Neighbor's house alarm triggers when I put my car in reverse by IndrekR on Monday December 18, 2017 @02:42AM (#15950112)
(Un)fortunately there are things that are written down in standards, like the LED blinking behavior, that the manufacturers can not change if they want to legally sell the devices.

You can get a smoke alarm with 10 year battery life to reduce the likelihood of this happening. When all are purchased in one batch, you can then pretty much replace them all at once -- if first battery goes, next ones are soon to follow.

I got some unconventional looking ones from Jalo Helsinki [1] for my house. They work well and look good. However, I know some people working at Jalo, so my opinion is biased. There are several other long battery-life smoke alarms on the market from different manufacturers to choose from.

[1] https://www.jalohelsinki.com/product-category/smoke-alarms-1...

Re:Neighbor's house alarm triggers when I put my car in reverse by kalleboo on Monday December 18, 2017 @05:45AM (#15950756)
You could also just buy the Lithium 9V batteries instead of Alkaline and put in your regular smoke detector - same result https://www.amazon.com/dp/B01684J7P0
Re:Neighbor's house alarm triggers when I put my car in reverse by IndrekR on Monday December 18, 2017 @10:38AM (#15952295)
If it runs on a standard 9V battery, then a very good option! Newer and smarter smoke detector chips are designed for 3V lithium-manganese dioxide batteries.
Re:Neighbor's house alarm triggers when I put my car in reverse by wbl on Monday December 18, 2017 @10:24AM (#15952214)
Can you seriously not add a "Change Battery" LED next to it?
Re:Neighbor's house alarm triggers when I put my car in reverse by IndrekR on Monday December 18, 2017 @10:35AM (#15952281)
In theory, you can. However, the standards also mandate that the "annoying" function has to work at least few months after the battery is low. Adding an extra LED there will consume too much power.
Re:Neighbor's house alarm triggers when I put my car in reverse by azernik on Sunday December 17, 2017 @11:49PM (#15949507)
Vaguely related - I once met a parrot that had learned to imitate that exact chirp. Maddening.
Re:Neighbor's house alarm triggers when I put my car in reverse by logfromblammo on Monday December 18, 2017 @10:34AM (#15952273)
I know a caique that learned how to imitate a ringing telephone. They had to replace all the phones in the house with a different model, because they were constantly looking at dark caller ID panels that didn't ever say "your parrot".
Re:Neighbor's house alarm triggers when I put my car in reverse by DonHopkins on Monday December 18, 2017 @06:37AM (#15950958)
Back when Facebook used a "pop" sound when you get a message, I was able to imitate it well enough to make my friends in the same room check their computer for messages!
Re:Neighbor's house alarm triggers when I put my car in reverse by rdc12 on Monday December 18, 2017 @07:40AM (#15951212)
In the late 90's early 00's, we had a pet cockatiel that could perfectly mimic the sound of dial-up modem dialing. He would also do the tunes to TV theme songs and a few regular TV ads.
Re:Neighbor's house alarm triggers when I put my car in reverse by Washuu on Monday December 18, 2017 @12:04AM (#15949569)
The whole house hard wired smoke alarms are just SO FUN when they start to fail. The one that is failing immediately sets all of them off, but only once at 3AM every night for two weeks. So you get woken up by a brief ear piercing alarm from around the whole house and have no idea which one it is.
Re:Neighbor's house alarm triggers when I put my car in reverse by dvtv75 on Monday December 18, 2017 @06:32AM (#15950931)
I had a battery powered one that randomly triggered in the small hours. I'm very sensitive to loud high-pitched sounds, so I woke up with a fright that must have aged me 20 years. Tore that thing off the ceiling, nearly pulling a chunk out with it. Landlord was very unhappy with me doing that, but it was right over my bed.

If I'd had a baseball bat or wooden sword, I'd have smashed that thing free like a piñata!

Re:Neighbor's house alarm triggers when I put my car in reverse by lostlogin on Sunday December 17, 2017 @11:20PM (#15949389)
Elsewhere in the thead I was moaning about this design, as multiple times it’s been in flat in our neighbours house and I’ve been checking ours. Can’t they just die quietly? If you aren’t checking them periodically anyway, you don’t know they they work.
Re:Neighbor's house alarm triggers when I put my car in reverse by TeMPOraL on Monday December 18, 2017 @12:49AM (#15949701)
They shouldn't, unless you want to risk dying with them :).

That said, everyone should check their alarms at least once. You should be able to find appropriate "testers" to purchase with alarms. I use CO alarms at the place I live in (gas-heated water), and each of them I tested with what I affectionately call "carbon monoxide in a spray can".