End-user Alert Delivery (was Re: NDAA passed: Internet and Online Streaming Services Emergency Alert Study)

Mel Beckman mel at beckman.org
Thu Jan 14 08:09:23 UTC 2021


This is because there is only enough undecayed Americium in the 10-YO smoke detectors to supply radioactive boyscouts with reactor fuel :)

 -mel

> On Jan 13, 2021, at 11:49 PM, bzs at theworld.com wrote:
> 
> 
> On January 14, 2021 at 04:56 jra at baylink.com (Jay R. Ashworth) wrote:
>> Well, it probably gets way worse: if it's a "permanent" battery, it will be
>> harder to find, and harder to replace...
> 
> No, you don't replace the permanent batteries in these 10 year smoke
> detectors, you toss the whole smoke detector and buy a new one. Heroic
> efforts aside.
> 
> So you don't need to find the right battery.
> 
> FWIW many smoke detectors bought in the past 10-15 years (I dunno but
> something like that) even with typical replaceable batteries have some
> sort of timer in them so when they hit 10 years they begin beeping in
> a slightly different pattern (like two short beeps every 60 seconds)
> and replacing the battery doesn't help. It just begins doing that on
> the fresh battery until you figure out that you need to toss the
> detector and buy a new one.
> 
> Ran into that, looked it up on their web site as I was confused why a
> new battery wasn't helping and they confirmed that means the detector
> has expired buy a new one.
> 
> I assume these 10 year sealed smoke detectors somehow came out of
> that.
> 
>> 
>> ----- Original Message -----
>>> From: "William Herrin" <bill at herrin.us>
>>> To: "jra" <jra at baylink.com>
>>> Cc: bzs at theworld.com, nanog at nanog.org
>>> Sent: Wednesday, January 13, 2021 11:52:47 PM
>>> Subject: Re: End-user Alert Delivery (was Re: NDAA passed: Internet and Online Streaming Services Emergency Alert Study)
>> 
>>> On Wed, Jan 13, 2021 at 7:58 PM Jay R. Ashworth <jra at baylink.com> wrote:
>>>> Last time I looked, consumer residential smoke detectors were still running
>>>> off 9V alkaline batteries, which are expected to run the device for 6 months
>>>> of 1/99 duty cycle (or less, probably *way* less).
>>> 
>>> Ordinary ionization-based smoke detectors use a 10-year lithium
>>> battery, which is about the same lifespan as the americium-based
>>> detector circuit as it begins to decay into neptunium.
>>> 
>>> You may now resume your argument over how much battery drain is too much.
>>> 
>>> Regards,
>>> Bill Herrin
>>> 
>>> 
>>> --
>>> Hire me! https://bill.herrin.us/resume/
>> 
>> -- 
>> Jay R. Ashworth                  Baylink                       jra at baylink.com
>> Designer                     The Things I Think                       RFC 2100
>> Ashworth & Associates       http://www.bcp38.info          2000 Land Rover DII
>> St Petersburg FL USA      BCP38: Ask For It By Name!           +1 727 647 1274
> 
> -- 
>        -Barry Shein
> 
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