According to the U.S. Fire Administration, you should change the batteries in your smoke alarms and carbon monoxide detectors twice a year.
A good way to make sure you're doing this is to check them on the days you change your clocks.
"Look at the back of your smoke detector and make sure it's not more than 10 years old." Bangor Assistant Fire Chief, Dennis Nadeau, said. "If it is, you need to discard it and replace it."
Nadeau says it's also important to test the alarms in your home monthly.
Changing alarm batteries biannually and testing your alarms could end up saving your life.
"50% of fire fatalities are from a lack of working smoke detectors in homes." Nadeau said. "It's very important because fires happen frequently at night when people are sleeping and you won't be alerted to that without working smoke detectors in your home."