Add Yahoo as a preferred source to see more of our stories on Google. Everyone's well aware of how important smoke detectors are, but there's another early-warning system every home should have.

This is my experience after trying out a portable carbon monoxide detector from First Alert, for a month.

Add Yahoo as a preferred source to see more of our stories on Google. You've got your suitcase packed with clothes, shoes, and toiletries, and your carry-on has your passport, phone, and laptop. But ...