The Smoke Detector

Why is it that when the batteries on the smoke detector decide to start dying it is always in the middle of the night? So you are all dead asleep (ok everyone except me because I am being the middle of the night milking machine), and the beeping sound starts. I hear Andy start yelling for me, so I lay Macady down and go to his room. He wants to know what is that, and I tell him it is just beeping and Dad will fix it tomorrow. I leave his room and head to the bathroom, not because I am pregnant and need to go, but because I am up two to three times a night being the milking machine and it always makes me need to use the bathroom. All of a sudden Andy starts screaming at the top of his lungs. I hear Alex jump up from bed and run down the hall so Andy can yell "What is that?" So it is three in the morning, and Alex is now attempting to change the stupid battery. However, these particular smoke detectors will only accpet a duracell battery, and since it is the middle of the night Alex can't find that particular kind of battery. So twenty minutes later he come crawling back to bed all the while cussing our duracel and the smoke detector company for teaming up together to try and make our lives as complicated as possible!