Replacing smoke alarm batteries can be a hassle. It always seems that just as soon as you've installed fresh ones, the low-battery warning is beeping at you again. Many homeowners wonder why their ...

This smoke alarm is also the only model that periodically self-tests to ensure all is functioning well; this cuts down on those annoying low-battery chirps in favor of useful smartphone notification.

Another benefit of the gadgets is that you'll be warned that your smoke alarm is running low on battery seven days before it starts beeping. But it's tech like this – a smart smoke alarm ...