Review on 🔌 Plug-in Carbon Monoxide Detector Alarm - 900-0284 Model with Digital Display and Lithium Battery Back-up (KN-COP-DP-10YH) by James Cruz

We bought two of these things. We installed it exactly according to the instructions and everything went fine at first. However, after about five minutes, the device began to emit random/periodic chirps at low volume. We thought it might be something random that happened at launch. But after 20 minutes, we checked the instructions and found that the chirp indicated "low battery/replace alarm." It was a BRAND NEW UNIT. Since we thought we had a defective one (that happens), we tried to reinstall the second one exactly as instructed. Exactly the same thing happened. Our first thought was that maybe the battery died from the factory and needed to be charged. But the instructions didn't say anything about it. Call to company number 800 was disconnected after 25 minutes "Your call is very important to us". Guess what? Our lives are very important to us. We will return the product and buy something else.