Review on Long-Lasting Protection: Kidde 21010047 C3010D Carbon Monoxide Alarm with Digital Display and 10 Year Sealed Battery by Justin Fletcher

Just received it today, but so far so good! The carbon monoxide sensor is definitely working since I did a little test. I suspected that my apartment might have low CO levels due to the heating system in my house. I hope I'm wrong, but I still decided to get a carbon monoxide alarm with a digital display so I can monitor it. I wasn't sure about lithium batteries but replaceable battery packs are sold out so I went with these. Box opened (production date 2/2108, not bad but not great as it's already December 2018), activated and everything worked fine, the gauge is at zero. I wanted to be ABSOLUTELY SURE the CO sensors were working properly, so I did a spark plug test. I placed the device in a stainless steel cooking pot with a lit tea light. Place the pot on the lid to create an airtight environment. And waited about 3-4 minutes. When I opened it up again, the meter read 90. It quickly returned to 0 over the next 2-3 minutes. After it went back to 0 I pressed the peak level button and it read 90. So now I can be sure that this device does what it is supposed to do. Can't comment on the battery life yet as I just got it. That's great, because the digital display is permanent and can be viewed at any time. I highly recommend getting one of these for each bedroom in your house and placing them next to your bed.