Quote:
Originally Posted by retiredguy123
My new house batteries lasted 4 years. I don't know what is meant by "bulk batteries", but every First Alert detector comes with a new battery preinstalled in the detector. You pull out a plastic tab to activate the battery. And, the device is designed to chirp when the battery level is low, so you know when to replace it.
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I would disagree on new build batteries. The day detectors were installed all but 3 chirped. Batteries changed, because builder found them annoying. During our walkthrough, every detector was chirping. Batteries changed while we were at walkthrough.
Week later 1/2 chirping, we changed all of them with new batteries. Chirping stopped.