🔍 Click to zoom
Kidde COB10 Carbon Monoxide Alarm, 10-Year Battery, LED Alarm-Only
$45.97
Final price set by Amazon · may vary
EDITORIAL REVIEW: 4.5/5 WC Safety Review — the Kidde COB10 carbon monoxide alarm Editorial assessment by the WC Safety Editorial Team, based on published Kidde specifications and category fit. We did not laborator...
Key Features
- Sealed 10-year battery — no replacement or chirps
- Alarms at dangerous CO levels for fast evacuation
- 85 dB alarm with flashing light alert
- Flexible tabletop or wall-mount placement
- No low battery chirps ever
- 10-year limited warranty
🔒 Amazon Associate · You pay the same price · We earn a small commission
Zero Sponsored ListingsNo paid placements. Every recommendation is based on compliance, build quality, and field performance.
Curated SelectionExpert-chosen safety gear
Independently ReviewedUnbiased assessments — no manufacturer input
Built for Industrial BuyersSourced and reviewed for safety managers, procurement teams, and field supervisors.
EDITORIAL REVIEW: 4.5/5 WC Safety Review — the Kidde COB10 carbon monoxide alarm
Editorial assessment by the WC Safety Editorial Team, based on published Kidde specifications and category fit. We did not laboratory-test this product.
CHECK PRICE ON AMAZON →SHOP CO ALARMS & DETECTORS →
As an Amazon Associate, WC Safety earns from qualifying purchases. Full affiliate disclosure.
Kidde COB10 Carbon Monoxide Alarm, 10-Year Battery, LED Alarm-Only Overview
The Kidde COB10 carbon monoxide alarm is a battery-powered residential CO alarm and the budget, no-frills model in Kidde's 10-year sealed-battery line. It uses an electrochemical CO sensor and a sealed 10-year never-replace lithium battery, so there is no wiring and no battery to change, and it can be wall-mounted or set on a countertop. It signals CO with a red LED and an 85-dB alarm, and it has a Test/Hush button and an end-of-life notification.
As the Kidde COB10, this LED carbon monoxide detector keeps things simple. As an alarm-only CO detector it has no screen, and as a 10-year sealed battery CO alarm it needs no outlet or battery changes. As a budget CO alarm it is the most economical way into Kidde's sealed-battery range.
This is a standard, alarm-only CO alarm, not a display, smart, air-quality, gas, or smoke model. Compare it against other carbon monoxide alarms and detectors, the display-equipped Kidde COBD10, the wider Kidde CO alarms range, or a smart CO alarm if you want app alerts, before ordering.
What This Alarm Is Built For
| Use case | Fit | Buyer guidance |
|---|---|---|
| Budget CO protection | Purpose-built | Most economical Kidde 10-year sealed-battery CO alarm. |
| No-wiring, no-maintenance | Strong | Sealed 10-year battery; no outlet or replacements. |
| Simple LED alarming | Strong | Red LED and 85-dB horn; no screen to read. |
| Flexible placement | Strong | Wall-mount or countertop as needed. |
| Numeric readout / app / gas | Not suitable | Choose the COBD10, a smart, or a gas model. |
A carbon monoxide alarm is a life-safety device, so treat any CO alarm as an emergency: get to fresh air, call for help, and have the source fixed by a professional. This is a residential early-warning alarm; it is not built for occupational settings where carbon monoxide can climb to IDLH concentrations that demand industrial gas-detection instruments and rescue procedures, so use the right tool for each environment. Install and place it per the Kidde manual and local codes, generally on each level and near sleeping areas, keep the sealed-battery unit intact, respond to the alarm rather than waiting since there is no numeric readout on this model, and replace the whole unit when it gives its end-of-life notification. Learn placement and CO risks in our CO detector placement guide and carbon monoxide exposure symptoms guide.
Pros & Cons
Pros
- Most economical Kidde sealed-battery CO alarm
- Sealed 10-year never-replace battery
- No wiring; wall-mount or countertop
- Test/Hush button and end-of-life notification
- 85-dB alarm; designed to UL 2034 5th Edition
Cons
- No digital display or peak memory (see COBD10)
- No WiFi, app, air quality, or low-level alert
- CO only — not a gas or smoke alarm
- Whole unit is replaced at 10-year end of life
How It Compares
The COB10 is Kidde's simplest sealed-battery CO alarm. Weigh it against the alternatives before ordering:
| Option | Display | Power | Best for |
|---|---|---|---|
| Kidde COB10 (this page) | LED only | Sealed 10-year battery | Budget, no-frills CO alarming |
| Kidde COBD10 | Digital ppm + memory | Sealed 10-year battery | Seeing the CO reading |
| Smart WiFi CO alarm | Digital + app | Plug-in + AA | App alerts and remote monitoring |
Choose the COB10 for the most economical sealed-battery CO alarm, the COBD10 for a numeric display, or a smart CO alarm for app alerts. See our best carbon monoxide detectors guide, the best garage CO detector guide, and, for work settings, the best industrial CO monitor guide.
Specifications
| Brand | Kidde |
| Model | COB10 |
| Type | Battery-powered residential carbon monoxide alarm (CO only, alarm-only) |
| Power | Sealed 10-year never-replace lithium battery; no wiring |
| Indicators | LED status; Test/Hush button; end-of-life notification (no digital display) |
| Alarm / Listing | 85 dB; wall or countertop; designed to UL 2034 5th Edition |
Related Guides
best carbon monoxide detectors, CO detector placement guide, carbon monoxide exposure symptoms, best garage CO detector, best industrial CO monitor.
Related Resources
carbon monoxide alarms and detectors Kidde CO alarms CO detectors smart CO alarms
Frequently Asked Questions
Does the COB10 have a digital display?
No. The COB10 is alarm-only with LED status indicators, not a numeric display. If you want to see the CO level in ppm, choose the COBD10, which adds a backlit digital display and peak memory for a little more.
How is the COB10 powered?
It runs on a sealed 10-year never-replace lithium battery, so there is no wiring and no battery to change for the life of the alarm. It installs anywhere without an outlet and keeps working during a power outage.
How does it signal carbon monoxide?
When CO is detected, a red LED blinks in sync with a short beep pattern, and the CO alarm continues in a repeating pattern. The 85-decibel alarm is designed to be heard through a home and to signal that you should move to fresh air.
Is this a smart or WiFi alarm?
No. The COB10 is a standalone alarm with a local horn and LED; it does not connect to WiFi or a phone app. If you want app alerts and remote notifications, choose a smart CO alarm instead.
Does it monitor air quality or detect gas or smoke?
No. It detects carbon monoxide only. It does not monitor air quality, and it does not detect natural gas, propane, or smoke. Choose a different Kidde model if you need any of those functions.
Does it have a low-level CO alert?
No. The COB10 uses standard CO alarm thresholds, not the earlier low-level alert found on Kidde's low-level model. If you want low-level alerting, look at that version; otherwise this alarm follows the standard alarm points.
Where can I put it?
It is designed for wall mounting or countertop placement, so you can set it on a shelf or nightstand or mount it on a wall. Follow the Kidde manual and local codes for the recommended location in each room.
What is the Test/Hush button for?
The Test/Hush button lets you test the alarm's function and temporarily silence a nuisance alarm. It is the main control on this simple model, alongside the LED status indicators.
How long does the alarm last?
It is designed for about 10 years, matching the sealed battery, and it gives an end-of-life notification when it is time to replace the whole unit. CO sensors degrade over time, so replace it at end of life to keep protection current.
Is it certified?
Kidde states the COB10 is designed to the current UL 2034 CO alarm standard. Confirm the exact UL and ETL markings on the product packaging, and follow the manual for correct installation and testing.
Why choose the COB10 over the models with displays?
The COB10 is the most economical option and keeps things simple with LED status and no display. Choose it if you want reliable CO alarming without a screen; step up to the COBD10 or a smart model if you want a readout or app alerts.
What should I do when it alarms?
Treat a CO alarm as an emergency: move everyone to fresh air immediately, call emergency services or your gas utility, and do not re-enter until it is cleared. Then have the CO source found and fixed by a qualified professional.
Written by Steven Eaton, WC Safety Editorial. Specifications sourced from Kidde published data. Compare the range in carbon monoxide alarms and detectors.
WC Safety is an independent PPE retailer and Amazon Associate; no paid placement. Match the alarm to your home and follow the manufacturer manual and local codes.
Brand / Vendor
Kidde
Model / SKU
COB10
Product Type
Carbon Monoxide Alarm
Price
$45.97 (Amazon)
Rating
4.7 / 5 — 10 reviews
Availability
Check current availability on Amazon
No Paid Placements
Every product earns its place based on safety credentials and field performance, not advertising spend.
Industrial Grade Only
Products sourced for professional use in manufacturing, construction, and industrial environments.
Compliance Verified
Every product listed on WC Safety is reviewed for standards compliance and safety credentials before publication.
Sourced for Professionals
Gear selected for safety managers, procurement teams, and field supervisors — not casual consumers.
Verified Buyer Reviews
Customer Reviews
★★★★★4.8 / 5· 28 ratings on Amazon
★★★★★
Just what I need!
We lived in an apartment complex that was built in the 60’s and doe extra peace of mind we put this in our bedroom and living room.
Verified Purchaser · May 20, 20 · ✓ Amazon Verified Purchase
★★★★★
Installation
Ease to install and use. Works great
Verified Purchaser · May 17, 20 · ✓ Amazon Verified Purchase
★★★★★
Great choice for a low maintenance CO2 detector
Carbon monoxide (CO) is often called the "silent killer" because it is colorless, odorless, and tasteless. A reliable detector is a non-negotiable safety requirement for any home or office. The Kidde Carbon Monoxide Detector offers a "set it and forget it" approach to safety with several professional-grade features.Key Features10-Year Sealed Lithium Battery: The standout feature is the long-term power supply. Unlike older models that require annual battery swaps, this unit is designed to last a full decade.LED Status Indicators: The face of the device includes color-coded LEDs (typically Green for power, Amber for fault/end-of-life, and Red for alarm) providing a quick visual confirmation of the unit’s health.85 dB Audible Alarm: In the event of a CO leak, the 85-decibel siren is loud enough to wake sleepers or be heard through closed doors, meeting standard safety regulations.Self-Testing Capability: The unit features a prominent Test/Silence button to ensure the circuitry and siren are functioning correctly.The ProsMaintenance-Free: The 10-year battery eliminates the annoying "low battery" chirps in the middle of the night for the lifespan of the sensor.Compact Design: It features a clean, unobtrusive aesthetic that blends well with most wall or ceiling textures.Ease of Installation: Since it is battery-powered, no wiring is required. It can be mounted easily with a simple bracket or even placed on a high shelf.End-of-Life Warning: The device is programmed to signal when the 10-year mark is reached, ensuring you know exactly when the sensor itself has expired and needs replacement.The ConsNon-Replaceable Battery: Once the 10 years are up, the entire unit must be recycled and replaced. You cannot simply put in a new battery.Basic Interface: It lacks a digital display (ppm readout) found on more expensive models, which can tell you the exact concentration of CO in the air.Final VerdictThe Kidde Carbon Monoxide Detector is an excellent choice for those who prioritize reliability and low maintenance. It provides the essential protection needed without the hassle of frequent battery changes. I suppose that if I never hear the alarm it will be a good thing but that would be the only way I know it is working.
Verified Purchaser · April 8, 2 · ✓ Amazon Verified Purchase
★★★★☆
It works
I am not quite sure how to evaluate a carbon monoxide detector. I can say it works and it was super easy to mount.
Verified Purchaser · June 7, 20 · ✓ Amazon Verified Purchase
★★★★★
Well worth the price!
I have the required number of smoke detectors with the carbon monoxide detectors but I really like having this separate one that JUST sets for CO was sort of a reliability checker, let's have a stand alone checker to double check all the others and make sure that we haave soothing completely separate, not checking anything els. You hear horror stories and I hav chronic. It blends in with the paint so it doesn't stand out and look headaches so there are days when I will have aa much worse headache and I truly wonder.... could this b from something else? I check all my symptoms aand honestly look at carbon monoxide was a possibility. Now I have this as an extra added measure of protection not just for myself but for my family and it really gives me piece of mind. So far I have not had it go off, no going off when it shouldn't which happens with the smoke detectors occasionally. The color just blends in with the wall color so it is't offensive looking and I just feel a little bit safer having it in the bedroom hallway. Any additional safety measure is worth the money o me and I would highly recommend this item to anyone whether you have a family to protect or you live alone.
Verified Purchaser · May 31, 20 · ✓ Amazon Verified Purchase
★★★★★
Nice and convenient basic model (COB10). Tasteful update to the previous generation.
I got the model "COB10" Gen 5, which is the most basic built-in-battery model. It's nice and simple. It has no informative display; just a small 2-color LED (green = good; red = alarm). But this unit makes up for that in simplicity, small design, and my favorite feature: It won't do the "low-battery" chirps at night time (It has light sensor -- but don't worry, regular alarms aren't affected by the low-light "night" mode.)FYI: Not really a con or danger, but FYI, the base model COB10 does not monitor or alert for "Low level -- between 31 and 50 PPM," which is a level for health concern, not an immediate danger (per its user manual). So this is an alarm-device, not a health-monitoring device.NOTE: As with some other "10-year battery" devices, this has a MANDATORY end-of-life after 10 years. It seems to have a built-in timer that will force an end-of-life chirp, even if the battery is still good (my last CO detector did that). They imply it's a safety feature because the CO sensor itself becomes less reliable. But it's still a waste that it becomes plastic and lithium-battery garbage, with no easy recycle options.SIZE: 5" W x 2.75" H x 1.5" D (127mm W x 70mm H x 38mm D).PROS:+ Prevents nuisance "low-battery" chirps during night time (has a light sensor). NICE!+ Smaller, and more stylish than the rectangular previous generation (which I owned several).+ Has tiny "feet" so it can stand upright on a shelf. OR it can also be wall-mounted.+ Pressing "Hush" silence button also re-tests the air. High levels will result in another alarm "within 6 minutes."+ 10-year battery is nice, affordable and convenient (I hope it lasts that long).CONS:-- Spendy price, based on the currently marked at $46 USD. I can get a combo smoke+CO for less.-- Mandatory end-of-life after 10 years.
Verified Purchaser · April 7, 2 · ✓ Amazon Verified Purchase
★★★★★
Great little CO detector!
The Kidde 10-Year Carbon Monoxide Detector stands out immediately for its compact size and modern design. To me It’s noticeably smaller and sleeker than most detectors I’ve used, which makes it ideal for tighter spaces like my shuttle bus conversion.The biggest selling point here is the 10-year sealed battery, which is a bold claim—but also a huge convenience. Not having to worry about battery changes for a decade is exactly what you want in something designed for safety and peace of mind.In my case, I’m using this in a shuttle bus conversion where I occasionally run a diesel heater (properly vented outside). Even though we don’t typically sleep in it, having a reliable CO detector adds an extra layer of confidence if we ever do. It’s one of those things you hope you never need…but absolutely want if you do.Build quality is excellent, and everything feels very solid, durable for bouncing around driving down the highway, and well-assembled. It has been thoughtfully designed in many ways.One important note:The battery activation instructions could definitely be clearer. Especially what is written right above where you have to activate it on the back of the unit. Basically, you’ll need to remove the red tab and slide the activation switch to engage the unit. The wording on the back made it seem like this step was only necessary for wall mounting, which can be misleading. Be sure to reference the manual closely (and images help) so you don’t get stuck wondering why it’s not powering on like I did because there is no on and off switch except under that red tab.Overall, this is an easy 5 out of 5. Between the long-life battery, compact footprint, and dependable construction, it’s a smart safety addition—especially for small living spaces, vehicles, or backup use.
Verified Purchaser · April 7, 2 · ✓ Amazon Verified Purchase
★★★★★
Safety First
This Kidde COB10 carbon monoxide detector is a simple, no-frills safety device that prioritizes long-term reliability over features, which is exactly what most people want from a CO alarm.Setup is straightforward—mount it on a wall or place it on a surface, and it’s ready to go. The 10-year sealed battery is the main selling point. Once installed, you don’t have to worry about battery changes, low-battery chirps, or maintenance for the life of the unit, which is a big convenience factor in hard-to-reach spots or rental properties.The unit uses a loud 85 dB alarm with a flashing LED indicator, which is plenty strong for alerting you even from another room. The status lights are easy to understand at a glance (power, alarm, fault), and the design is intentionally minimal so there’s no confusion during an emergency.Performance-wise, this is exactly what you want from a CO detector: it sits quietly in the background until it’s needed. There are no smart features, app connectivity, or digital display options, but that also means fewer failure points and a more “install and forget” experience.ProsTrue 10-year sealed battery (no maintenance)Loud 85 dB alarm is easy to hearSimple LED status indicatorsFlexible placement (wall or tabletop)Trusted, established safety brandConsNo digital display or CO level readoutNo smart/home integration featuresBasic design (purely functional)Bottom lineThis is a reliable, straightforward CO detector for anyone who wants dependable protection without complexity. It doesn’t try to be smart—it just focuses on doing one job for 10 years without attention, which is exactly what a safety device like this should do.
Verified Purchaser · April 18, · ✓ Amazon Verified Purchase
★★★★☆
Well-designed CO detector with no need to replace batteries.
Although we don’t have any gas appliances, we have always had hybrid vehicles since their inception. A possible issue with hybrid vehicles is when the driver forgets to press the ‘Power’ button to turn off the vehicle. Although the engine may not be running at that time, the hybrid batteries are being used to supply power for the lights, dashboard, and other functions. Eventually, if left unattended, the hybrid batteries will be depleted enough for the engine to automatically start in order to charge the batteries. If the vehicle is parked in an attached garage, with the garage door shut, and there is an a/c unit air handler in the garage (like ours), the generated CO gas can easily be sucked into the ventilation system and could be deadly to the occupants. Although we have never had this scenario, it’s best to be safe. So when I saw this CO detector available, I had to order it. Remember that CO gas is odorless and tasteless, which makes it a potential silent killer.Here is what I like about the CO detector - Model COB10….- It’s a Kidde detector. I’ve only had Kidde smoke/fire detectors, which I’ve been generally very pleased with.- It has a built-in battery with a 10-year life. If there’s one thing I hate with my smoke/fire detectors that run on disposable batteries is that annoying beeping that sounds usually in the middle of the night, indicating that the battery needs to be replaced.- It is very compact and unobtrusive, which can be mounted on a wall or placed on a table. I will be mounting my unit on the wall in a central location. Note that there are limitations to where to mount in order to avoid false alarms (see manual).- It has a test/hush button.- It has a very loud alarm!- Easy mount with two screws and anchors (if needed).- There is an ‘End of Unit Life’ indicator after 10 years (chirping).The one issue I have with this model is that it does not have the ‘Low Level CO Alert,’ which could be very beneficial to most. Apparently, this feature is available on other Kidde models.
Verified Purchaser · April 14, · ✓ Amazon Verified Purchase
★★★★☆
be warned CO protection is good
Like all Kidde products you can rest assure you are getting quality giving you a piece of mind the you will be safe. Kidde products are reliable and the CO sensors are made very well. they make a good loud sond when set off. the 10 year battery is nice no worries. these are easily installed on the wall or ceiling.
Verified Purchaser · April 22, · ✓ Amazon Verified Purchase
Showing 10 of 28 Amazon reviews.
Share Your Experience
Write a Review
Thank you for your review!
Your submission has been received and will be published after verification.