Kidde Worry Free 10-Year Lithium Ion Battery Operated CO Alarm-21009718 - The Home Depot


Model # 21009718

Internet # 203728675

Store SKU # 151038

Worry Free 10-Year Lithium Ion Battery Operated CO Alarm

Kidde Worry Free 10-Year Lithium Ion Battery Operated CO Alarm

This item has been discontinued.
The Home Depot no longer carries this specific product.

$39.97 / each


Model # 21009718

Internet # 203728675

Store SKU # 151038

Store SO SKU # 198092

Kidde 10 year Worry Free Carbon Monoxide will provide you and your family with a loud warning signal against the dangers of elevated carbon monoxide levels in your home. No more waking in the middle of the night to the dreaded mid-night chirp when you install this worry-free alarm that is powered by a ten year sealed long-life lithium battery. With this alarm monitoring your home for carbon monoxide you and your family are protected from the dangers of the silent killer, even during power outages.

  • Kidde 10 year carbon monoxide alarm is maintenance-free; never replace a battery during the alarm's operating life, in addition to the benefit of maintenance free, batteries are sealed, no need to worry about them being removed
  • Features an end-of-life signal that alerts you when it is time to replace the alarm; signal chirps every 30-45 seconds when alarm needs replaced
  • Money savings, no batteries to buy and replace every six months, save up to $40.00 over the life of the alarm
  • Alarm is equipped with test – reset button, tests the circuitry and horn and resets memory after alarm has sounded
  • Alarm is UL listed and is equipped with a piezoelectric horn that is rated at 85 decibels at 10 feet and electrochemical sensor that last 40% longer than other carbon monoxide alarms

Info & Guides

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Assembled Depth (in.)  1.5 in  Assembled Height (in.)  2.75 in 
Assembled Width (in.)  4.5 in 
Alarm Type  Carbon Monoxide  Alarm/Detector Features  10-Year Battery,Tamper Resistant 
Battery Back-Up  No  Commercial / Residential  Commercial / Residential 
Connector/Contact Type  None  Hazardous Code  No Air 
Included  Batteries  Power Source  Battery 
Returnable  90-Day  Voltage (volts) 
Warranty / Certifications
Certifications and Listings  1-UL Listed 


Rated 4.7 out of 5 by 31 reviewers.
Rated 5.0 out of 5.0 by Super easy install What an easy install it was! Just 2 screws into the back plate to the wall and slide the CO alarm in. That's it. Nothing difficult at all. With a 10-Year battery I don't have to worry about it. There is no battery to change when the battery does die out. You would just buy a replacement. A quick tip, make a calendar reminder on Google Calendar or whatever app you use to check on it 10 years from now. July 27, 2014
Rated 5.0 out of 5.0 by Piece of mind and 10 year battery. Great deal. Piece of mind and keeps on working for up to 10 years of continuous protection. I have an older heating system and also use a secondary heating unit which is a wood pellet stove in the family room over the winter months. I am always concerned about the possible buildup of the deadly carbon monoxide gas in my home. Better safe than sorry. This small wall mounted unit is easy to install and sets up as soon as you mount it on its wall mount. Two screws hold it in place and then let it do the work for up to the next ten years before the lithium battery wears out and replacement will be required of the alarm system.I mounted this unit in my living room. I like its modern sleek look and compact size. It is not an eyesore and placed in plain sight and can be heard from anywhere in my home should the alarm sound it can be heard to alert us of danger May 16, 2014
Rated 5.0 out of 5.0 by Worry Free, Sleek Design I worked with a volunteer firefighter who had asked me if we had a carbon monoxide alarm in the house, saying no, he then suggested that we should install one. I did on his recommendation, that was 14 years ago. Thank goodness we never had the alarm go off. The CO alarms do have to be replaced periodically and when the opportunity arose to replace it with an another Kidde who could say no. The model C3010 has a ten-year battery that is not replaceable. Simple to switch on, just slide the back plastic plate into place and it's activated, you'll hear the alarm letting you also know that it was activated. It comes with easy to follow instructions, in English and Spanish, on what carbon monoxide is, installation, and maintenance. Just as you would not be found dead without a smoke alarm you should feel the same about a CO alarm. August 21, 2014
Rated 5.0 out of 5.0 by Extremely happy I purchased these items ! I purchased 2 CO Alarms ... one for upstairs near bedrooms and one for the main level of my small town home. I am so very happy to have these ... they replace the ones I had that worked just fine, but needed to be plugged in ... both covering the entire electrical outlet where they were plugged in. It is great to have 10 years of protection and be able to conveniently place them / hang them without monopolizing my valuable electrical outlets. I love the subdued blinking of the tiny green light which assures me that it is working and keeping me safe ! I'm so very happy I have purchased these ! October 28, 2014
Rated 5.0 out of 5.0 by looking forward to 10 worry-free years This unit is easy to install and seems to be made well, as I've come to expect with Kiddie. I like the compact size and unobtrusive design, I also appreciate that the clamshell package was easy to open. November 13, 2014
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