This is a shitshow, probably illegal and the “10” years smoke detectors never last more than 6, like i know a German Youtuber did some magic math and testing, the 10 years is even under laboratory conditions basically impossible, in the real world the thing may go off once or twice, and are tested if they work, already taking out at least 1 year of time…
I fucking want my 9V powered smoke detectors back.