Holy shit what a coincidence! I have been battling these bastards for a month now and some of mine are 18'+ in the air. Seems like every time i get one fixed another starts the low battery beep, fix that and then one i fixed a month ago starts again WTF then start process over again. what really burns my ass is these bastards are hard wired so what the hell do I need a battery for! (i know i know if the power goes out blah blah blah)