Quote:
Originally Posted by mtdjed
But they are not on the shelf. They are constantly checking the status. I always wait until one starts beeping and then change them all. That first one always happens in the middle of the night in our bedroom.
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I agree. Note that the beeping or chirping sound is triggered by a drop in voltage across the battery terminals. The chirping is not powered by the battery, but by your house power. Even if your remove the battery, the chirping will continue until you replace the battery.