And tests don't just confirm that smoke detectors have power -- they can also tell you if you need to switch out batteries before your alarm throws a high-pitched fit.

Tucson firefighter Aarron Schreiber puts the date on a smoke detector he is getting ready to install. Most detectors have a 10-year life span.

The Griffith firefighters distributed free smoke detectors to any resident who wanted one beginning Wednesday.

Among a plethora of options to choose from, here are the six best hard-wired smoke detectors from our testing. Take a peek!

Our experts list six best battery smoke detector options, so you can have the best purchasing experience with no fool. Click to see all of our picks.