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Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable

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Features

  • Electrochemical sensor technology detects CO gas
  • Easy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included)
  • Conveniently designed & portable: simple to install on a wall of your home or place on a tabletop
  • Green LED indicates power to the smoke detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
  • Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
  • Test-Hush button makes it easy to test the carbon monoxide detector or temporarily silence the low battery chirp warning
  • UL listed with a 10-Year limited manufacturer warranty on the alarm only (not a battery performance claim). Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that replacement is needed.

Description

The Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, model 900-0146, is a carbon monoxide detector that uses electrochemical sensor technology to detect carbon monoxide. The CO detector is powered by 2-AA alkaline batteries located in the back of the unit, providing easy installation & no wiring, plus coverage during a power failure. The alarm is conveniently designed and portable enough for travel - simply install it on a wall or place it on a tabletop. When carbon monoxide is detected, an 85-decibel alarm will sound & a red LED will flash. A green LED indicates that the alarm is receiving power. The test-hush button allows you to test the battery operations as well as temporarily silence the low battery chirp warning. Plus, peak level memory records the last time carbon monoxide was detected or when the unit was last tested. Install a smoke detector & carbon monoxide detector on every level of your home and near bedrooms to help keep your family safe from fire & poisonous gas. UL Certified with a 10-year limited manufacturer's warranty. Kidde’s KN-COPP-LPM battery- operated carbon monoxide alarm with digital display helps to provide your home with extensive protection against the dangerous threat posed by the odorless and colorless gas. With an increasing number of state and local governments passing legislation requiring CO detectors in homes, it’s never been a better time to safeguard your family against carbon monoxide exposure. KN-COPP-LPM Battery-Operated Carbon Monoxide Alarm At a Glance:Digital display allows for easy monitoring of CO levels Battery operation provides best protection during power outages Peak level memory displays the highest CO concentration since last reset Dimensions: 4.5 inches by 2.75 inches by 1.5 inches; weighs .66 pounds with batteries Five-year limited warranty Kidde's KN-COPP-LPM carbon monoxide detector is a free-standing unit, adding flexibility to placement around your home. View larger Features The KN-COPP-LPM is an essential device to help warn you and your family of dangerous carbon monoxide levels in your home. This alarm measures the exposure to carbon monoxide over time; it is designed to sound at 85 decibels at 10 feet when it detects 70 ppm (parts per million) of CO for 60 to 240 minutes, 150 ppm for 10 to 50 minutes, or 400 ppm for 4 to 15 minutes. The easily visible digital display indicates the level of CO that the unit is sensing, and it updates the status every 15 seconds for timely and accurate readings. Its free-standing design allows for attachment to a wall or placement on a counter or nightstand for convenient and comprehensive protection. The KN-COPP-LPM also includes a slide-out battery door that provides immediate access to the power source as well as a battery safeguard that makes it difficult to close the cover without batteries installed. An LED lighting system on the unit signals power levels and sourcing: the green LED will flash once every 30 seconds to indicate the alarm is operating properly when power is present, and the red LED will pulse to indicate carbon monoxide has been detected until the device is reset or the CO threat is eliminated. This device has an expected 7-year lifespan and comes equipped with a five-year manufacturer’s limited warranty. What's in the Box One Kidde KN-COPP-LPM battery-operated carbon monoxide alarm with digital display and three AA batteries. The KN-COPP-LPM features an easy-to-read digital display in front and an easy-access door to the batteries in back. (Click each to enlarge) P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); From the Manufacturer Kidde KN-COPP-B-LPM Battery-Operated Carbon Monoxide Alarm w/ Digital Display - Digital screen with large display is easy to read - Peak- level memory displays the highest CO concentration measured since the last reset - Meets the all UL requirements - Battery operated with three AA batteries included - Backed by a five-year warranty The new Kidde KN-COPP--LPM carbon monoxide alarm is the only battery-operated alarm that includes a digital display feature. This key feature adds an advanced level of protection that you have come to expect in a Kidde manufactured product. The battery operated CO alarm includes multiple mounting options, allowing installation on a wall or tabletop. This alarm has been carefully designed and tested to detect CO concentration in a residential environment. It provides continuous monitoring of CO levels, even during power outages when many CO incidents occur. The digital display feature allows for easy viewing of carbon monoxide levels from 30-999 PPM (parts per million). The KN-COPP-LPM will also detect and store concentration CO levels as low as 11 and up to 999 PPM with its peak level memory display. This alarm includes a snap-on cover that gives immediate access to the batteries and a safety feature that makes it difficult to close the cover without the batteries being installed. Updates digital reading every 15 seconds, allowing you to see if levels change. The peak level memory displays the highest CO concentration measured since the last reset. The test/reset button tests CO alarm circuit operation and allows you to immediately silence the alarm. A low battery signal alerts users when the batteries need to be replaced. Includes informative LEDs: green LED for normal operation, red LED for alarm. The alarm alerts user to replace CO alarm after 7 years of operation.Sensor: Electrochemical. See more

Brand: Kidde


Power Source: Battery Powered


Color: Detector


Product Dimensions: 1.5"D x 4.5"W x 2.75"H


Item Weight: 9.28 ounces


Alarm: Audible


Operating Humidity: 5% to 95% relative humidity, non-condensing


Upper Temperature Rating: 37.8 Degrees Celsius


Sensor Type: Electrochemical


Global Trade Identification Number: 37


Brand: ‎Kidde


Power Source: ‎Battery Powered


Color: ‎Detector


Product Dimensions: ‎1.5"D x 4.5"W x 2.75"H


Item Weight: ‎9.28 ounces


Alarm: ‎Audible


Operating Humidity: ‎5% to 95% relative humidity, non-condensing


Upper Temperature Rating: ‎37.8 Degrees Celsius


Sensor Type: ‎Electrochemical


Global Trade Identification Number: ‎37


Number of Items: ‎1


Manufacturer: ‎Kidde Safety


UPC: ‎785983912532 716080045267 047871088737


Part Number: ‎21008873


Item Weight: ‎9.3 ounces


Item model number: ‎KN-COPP-B-LPM


Batteries: ‎3 AA batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Size: ‎KN-COPP-B-LPM


Pattern: ‎Detector


Voltage: ‎3 Volts


Item Package Quantity: ‎1


Special Features: ‎Portable


Included Components: ‎Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-Copp-B-LPM


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Warranty Description: ‎10 Year Limited


Date First Available: May 11, 2011


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jan 29 – Jan 30

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • It’s UL-certified, so I know it meets safety standards
Size: KN-COPP-B-LPM Color: Detector Pattern Name: Detector
I purchased this kidde co detector for our car or when we travel. I got this brand coz it’s UL-certified, so I know it meets safety standards and has been properly tested that alone gives me confidence it’s reliable. Setup was easy since it runs on AA batteries, no wiring or complicated installation required. The LED indicators make it simple to check status at a glance, and the test/reset button works smoothly. It also says there will be low-battery alert, so it won’t quietly stop working without me knowing. The portable size is another bonus it’s easy to move if I want coverage in other places, or even take it along when traveling. For anyone looking for a trusted, approved, and low-maintenance CO alarm, this one really covers the essentials. You have to do research before buying ... show more
Reviewed in the United States on September 7, 2025 by Jem Jem

  • Simple and important to have
Size: KN-COPP-B-LPM Color: Detector Pattern Name: Detector
I picked up this carbon monoxide detector because I realized the one we had was way too old and probably not doing much anymore, With kids in the house and a spouse who loves reminding me about home safety I figured it was time to actually replace it with something reliable, I wasnt looking for anything fancy just something dependable and easy to test, This one ended up being exactly what we needed When it arrived I put the batteries in and the whole setup took maybe a minute which was great because I was also trying to keep the kids from using the box as a spaceship, The test button worked right away and the alarm was loud enough that the kids came running asking what happened, At least now I know I will definitely hear it even if I am half asleep or buried in laundry The LED indicators are simple and make it clear when everything is working or when the batteries need changing, My spouse liked that part because they hate guessing whether a detector is actually active or just hanging on the wall for decoration, The low battery alert is loud but not painfully loud which is nice because those things always start beeping at two in the morning for some reason I mounted it in the hallway near the bedrooms and it has stayed in place without any issues, It is lightweight and portable so I could easily move it if needed or take it with us during a trip where we stay somewhere that doesnt have detectors, The kids even asked how it works which turned into a whole safety lesson that I didnt plan but I guess was good for everyone For something so small and simple it brings a lot of peace of mind and feels like one of those things every home should have without thinking twice I currently highly recommend this product. However, should issues arise I will update my review accordingly. ... show more
Reviewed in the United States on December 6, 2025 by Myls Dubya Es

  • Works great & easy installation . Will last for years.
Size: KN-COPP-B-LPM Color: Detector Pattern Name: Detector
Great product & my second time of purchasing this product
Reviewed in the United States on December 8, 2025 by Lou

  • Best bang for our buck.
Size: KN-COPP-B-LPM Color: Detector Pattern Name: Detector
Second one I bought for the house. I have five different units throughout the house, some use batteries others are plugin models. Everyone of these devices are not the best. They work based on two factors, the concentration of carbon monoxide and the length of time at that concentration. Two units sounded at the same time. They had different number readings but were in the same room. Traced the problem to a water heater with a dirty flame. Fixed the problem and the alarms went silent. I read the specifications included with the alarm and was surprised at the variability these can have. Also one of my older units went bad and ate batteries every 5 weeks. Do your family a favor and have more that one in the house. I have one in the furnace room, two upstairs, one in basement, and a floater that gets moved around. Why I like this one the best. It will tell you if there is a peak level even at 11 ppm. Most units do not. Peak level is important to check once in a while. The digital readout also tells you how serious the situation is. I had a 350 when the water heater went berserk. That means open ALL the windows. Also the battery models give you greater flexibility when deciding where to place it. Most of my electric outlet plug in models are in places that are inconvenient. I avoided the 10 year battery model because it might make me forget about this alarm, and you should check or test it (use the button) once in a while. For the price and features and reliability, this is your best choice. ... show more
Reviewed in the United States on March 17, 2017 by over analyzer

  • Great model for detecting CO2 in your homes/business. These last 10 years.
Size: KN-COPP-B-LPM Color: Detector Pattern Name: Detector
Good product at a great price. I wanted this item to replace our older detector and wanted to use the same mounting block. These last about 10 years to the day, and the detector will show END on the screen when ready to replace.
Reviewed in the United States on November 30, 2025 by Miller Tyme

  • Peace of Mind in a Compact, Reliable Device
Size: KN-COPP-B-LPM Color: Detector Pattern Name: Detector
The Kidde Carbon Monoxide Detector is one of those small investments that delivers huge peace of mind. After installing it in my home, I immediately felt more secure knowing that my family is protected from something as serious—and silent—as carbon monoxide exposure. Setup was incredibly easy. It took just a few minutes to install, and the instructions were clear and straightforward. The digital display is a nice touch—it gives real-time CO levels, which adds an extra layer of reassurance beyond just an alarm. What really stands out is its reliability and thoughtful design. It has a clear, loud alert that’s hard to miss, and the test/reset button works without a hitch. I also appreciate that it’s battery-operated with a backup option, so it continues working even during power outages. In a world where safety often gets overlooked until it’s too late, this detector provides consistent, quiet protection you can depend on. If you’re looking for an easy-to-use, durable, and accurate carbon monoxide detector, Kidde is a brand you can trust—and this unit proves it. Highly recommended for any home, apartment, or even RV. It’s a small device that could make a life-saving difference. ... show more
Reviewed in the United States on May 27, 2025 by Arod

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