Maybe it’s trying to compete with Edison’s light bulb:
“As I was laying it down, all of a sudden I heard it go ‘thunk!’ as it came loose,” he said. “I thought, well, that’s not a real problem. You know it’s still going to go off. And it did.”
He couldn’t pull it back up, but figured, “Maybe, three-four months it’ll run out of battery. That was in September of 2004. It is still going off every day. And during daylight savings time it goes off at ten minutes ’til eight. And during standard time it goes off at ten minutes to seven at night.”
Clocks do not draw much power from a battery, but the longest I’ve had one last is six years. This one has been ringing daily for 13 years. I would have torn the wall apart by now.