![First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White - Combination Smoke Carbon Monoxide Detectors - Amazon.com First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White - Combination Smoke Carbon Monoxide Detectors - Amazon.com](https://m.media-amazon.com/images/I/51RBX7hitxL.jpg)
First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White - Combination Smoke Carbon Monoxide Detectors - Amazon.com
![This stupid thing beeps even after changing battery. Why?!?! Am I supposed to do something more? : r/fixit This stupid thing beeps even after changing battery. Why?!?! Am I supposed to do something more? : r/fixit](https://preview.redd.it/this-stupid-thing-beeps-even-after-changing-battery-why-am-v0-ybuwj0o2b8qb1.jpg?auto=webp&s=1eb8a77ca58aedf7dae832ba6866eaa6cf24ca2c)
This stupid thing beeps even after changing battery. Why?!?! Am I supposed to do something more? : r/fixit
![First Alert SC9120B Direct Wire Combination Smoke And Carbon Monoxide Detector, 120 Volt With 9 Volt Battery Back Up 2 Pack - Walmart.com First Alert SC9120B Direct Wire Combination Smoke And Carbon Monoxide Detector, 120 Volt With 9 Volt Battery Back Up 2 Pack - Walmart.com](https://i5.walmartimages.com/asr/60394cb1-36ad-4fe5-9e13-198a59524095_1.b2cf254ac729b8fb257271c4ab2a871f.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
First Alert SC9120B Direct Wire Combination Smoke And Carbon Monoxide Detector, 120 Volt With 9 Volt Battery Back Up 2 Pack - Walmart.com
![First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com](https://m.media-amazon.com/images/I/81jtEpjcWAL.jpg)