On Tuesday, October 11, 2016 at 9:14:44 PM UTC-5, bob haller wrote:

i bought one of those smoke detectors with forever battery. the battery failed after just a few months.

to the trash it went

When Ray-O-Vac came out with a 5 (7?) yr lithium, I gave it a try in a smoke detector...it started beeping in less than 2 weeks! I have never had any faith in R-o-V crap, even before that...but I thought, what the hell! Never again.