Review on Interconnect Lithium Battery Powered Kidde Smoke & Carbon Monoxide Detector with Voice Alert - Combination Smoke & CO Alarm by Micheal Wolf

Installed a few 1.5 years ago. One is already broken. Now another beeps sporadically. All audio signals tell me to go to troubleshooting guide. According to the troubleshooting guide, it's defective. It's a lot easier to have a basic smoke alarm where you can just swap out the battery if something goes wrong. With this model, you can't even turn it off by removing the battery. I plan to drown it and then throw it away so it won't disturb my sleep for another night.