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$15 $30

Amazon has the First Alert PR710 Slim Photoelectric Smoke Alarm with 10-Year Sealed Battery for $15 with free shipping on $25+ or with Prime.

$15 retail: $30
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Comments & Reviews (3)

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suednim
Ben's cred: 427
Posted 02/23/2021 at 11:54 AM PT
Posted 02/23/2021 at 11:54 AM PT
With 10-Year Sealed Battery? Never gonna happen. And when it fails you'll be SOL.
dave_c
Ben's cred: 5746
Posted 02/23/2021 at 12:19 PM PT
Posted 02/23/2021 at 12:19 PM PT
^ Most such products are only rated for 10 years anyway, or some older CO alarms only 7 years.

IMO the main reason to get one with a replaceable battery is if you often have false (or arguably real, still airborn contaminants like burning food while cooking or sawdust in your workshop) triggers enough to wear the battery down prematurely.

Many things besides a legitimate smoke, health danger can set off the photoelectric type including cooking/burning things, condensation, even sawdust in my workshop can foul them so I put a shower cap over them till the dust settles, but eventual dust buildup will happen anyway, even if you have room air cleaners there had to be dust in the air for them to be doing anything.
barryk
Ben's cred: -242
Posted 02/23/2021 at 06:51 PM PT
Posted 02/23/2021 at 06:51 PM PT
^ who ARE you?!