Talking about a beeping. Why is it every time the smoke detectors batteries get low it's at 2am! WTH!!! Every freakin time!! I heard it about a week ago. Just once. I get up looking like a ding dong walking around the house looking up at the ceiling at every detector and all the lights are green. Why did one of them go off? It never did it again till a few nights later. Then again last night. Again I get up to find out wich one and the same thing! Makes me so mad. The easy answer I know is to change all the batteries but of some reason I want to find the one that is waking me up so I can throw it out the front door!