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Title: Perfect Replacement!
Review: I needed to replace a similar BRK CO/Smoke detector originally installed in 2003 because it just wouldn't stop chirping - no matter what kind of battery I put in (alkaline to industrial alkaline, to lithium ion). This unit needed its own backplate installed (unit would not fit the original one) but the plug-in connector was a perfect fit. All is good for another 8-10 years!
