I know this isn’t exactly your scenario, but your new batteries could be bad.
I replaced all my smoke detector batteries a few months back with new, name brand batteries. All was fine for the first day, The next day one of the detectors started chirping at me. I purchased another package of batteries and a friend stopped over with a battery tester. The “new” battery from the chirping detector showed it to be “low”. We checked the newest package and they all tested at full power. I ordered a battery tester for future use!
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