My 6year CO alarm has been going off and it requires a special battery for replacement.I tried duracell but it still did not quiet it down. Calls for a Ultra alkaline battery, but have not seen any. ...
I replaced the CO detector that came in our 2004 rig a few years ago. The company that made the original was out of business. The replacement was smaller so I had to glue in some wood pieces to mount it. It had an extra wire which I wrapped in electrical tape.