[tanzam75]

We're long past the point where you should be replacing smoke alarm batteries at all.

Put in a lithium battery. The lithium battery will last for the entire 10-year life of the smoke alarm. Thus, you should only replace smoke alarms -- not the battery.

In fact, these days, they're selling smoke alarms with sealed non-replaceable lithium batteries. This prevents people from attempting to use an alarm past end-of-life, and thus getting a false sense of security.

[VLM]

Oh whatever LOL. It'll be marketed as lasting a decade and value engineered to only last a year. You don't increase profits by making things last longer. By being sealed and making it chirp you'll force people to buy another instead of simply unpluging the battery.

The problem with a nanny state is eventually people rebel. The future of smoke detection is high profits for mfgrs and residents will spend an hour their first day in new premises disabling and disconnecting the devices. The overall effect on safety will be a profound net decrease, although theoretically on paper we'll never be safer.

[nknighthb]

I seem to recall seeing my first lithium battery smoke detector back in the 90s. I certainly haven't bought a non-hardwired detector that wasn't one of the 10-year lithium battery type in the past decade. (You'd have to ask my electrician what he just installed in my renovated house, I haven't looked too closely at them yet.)

Haven't given me any problems. Haven't heard about them giving anyone else any problems. You seem to be dismissing something that already has a proven track record. Why is that?

[ZoFreX]

They last much longer than a year. My dad has them in his house and he's had them a while now - the fire department in the area fit them for free.