Most battery powered smoke detectors will chirp sporadically when the battery is weak. We recommend that you change the batteries once a year, perhaps a significant day such as your birthday, or when you change your clocks in the spring or fall. Also, vacuum the detector once or twice a year to remove any dust or cobwebs. This will cut down on false alarms. Remember to always test battery powered detectors after a vacation or having been away from home for more than a week. The battery may have gone dead and you may have missed its warning alarm.
If a smoke detector is sounding, there is a reason! Never ignore the sound of a smoke detector! You and your family must be able to escape quickly and safely.