305
people found this helpful, as of 2023
ranked #82,804 most helpful
out of 571,544,897 reviews
★★★★★
Exact replacement for older version with 9-volt back-up battery on ...
Exact replacement for older version with 9-volt back-up battery on back (KN-COSM-IB). Didn't need to change connector even though one was supplied. This unit takes 2 AA batteries which were included. Gonna buy another to replace another older unit I have installed.
the product in question
Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators, 2 Pack
4.7★ · 10,053 ratings, as of 2023