I've had way, way, way, too many 'chirp' at 4am situations in my life. The alarms have _literally_ trained me like Pavlov's dogs that it is _always_ a false alarm, to the point where my sleep deprived brain stumbles through the door blindly into the hallway without even checking if there's heat or smoke.
Some of the other solutions here like cry wolf only if battery low _and_ power's out, or a dedicated LED to indicate a problem, or the one I keep thinking of; gently _saying_ there's a problem with a small sound clip of "bat" instead of an angry Chirp that must wake someone up would really help. The alternative that I've heard many others take is to just disable them entirely if you're in a rental. I'll admit that I've been very tempted to do just that for individual alarms which are overly sensitive to bathroom steam.
Some of the other solutions here like cry wolf only if battery low _and_ power's out, or a dedicated LED to indicate a problem, or the one I keep thinking of; gently _saying_ there's a problem with a small sound clip of "bat" instead of an angry Chirp that must wake someone up would really help. The alternative that I've heard many others take is to just disable them entirely if you're in a rental. I'll admit that I've been very tempted to do just that for individual alarms which are overly sensitive to bathroom steam.