Smoke Detector Think Tank

I just got off the phone with FIRST ALERT, the maker of our dual function hardwired smoke/carbon monoxide detector.    The reason being that it seems to want to chirp, once and only once, at about 4 in the morning. 

After changing the battery two times, I decided to give them a call & surprisingly got them after a mere 4 minutes on hold.   Their solution - I wasn't using an Energizer or Duracell brand battery.     WTF?   They left me with that suggestion, told me to push the reset button for 12 seconds and to call them again on Monday if there was a problem.