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A comment on Whatever happened to IoT smoke alarms?. Parent comment

Re:Whatever happened to IoT smoke alarms? by AstralStorm on Sunday April 11, 2021 @10:10AM (#26770483)
Well, you could have a mains powered rechargable battery (or supercapacitor) backed detector. Then again, it better be designed so that the sensor part is replaceable and it fails loud. (Though neither supercapacitor nor nickel-* cells are very expensive, we put them in random MP3 players for $10 a pop.)

The feature richness is a scam though.

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Re:Whatever happened to IoT smoke alarms? by brudgers on Sunday April 11, 2021 @12:04PM (#26771289)
The half-life of commodity rechargeable batteries is significantly less than the half-life of Americium.

And people who don't proactively replace smoke alarm batteries are unlikely to proactively change the alarms...changing out an alarm is a bigger job than changing batteries.

A smoke alarm is not a consumer product.

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