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Smoke Detector Carbon Monoxide Detector Combo 10 Year Battery Comparison - August 2025
| 1 Best Choice  9.8Exceptional | 2  9.7Exceptional | 3 Best Value  9.6Exceptional | 4  9.5Excellent | 5  9.3Excellent | 6  9.0Excellent | 7  8.9Very Good |
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ModelFirst Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack | Model X-Sense 2-in-1 Smoke and Carbon Monoxide Detector Alarm (Not Hardwired), 10-Year Battery-Operated Dual Sensor Fire & CO Alarm, SC06, 1-Pack | Model Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack | Model 3 Packs Smoke and Carbon Monoxide Detector Powered by Battery,Portable Smoke Detector Carbon Monoxide Detector Combo with Large LCD Display, Fire Alarm Smoke Detector for Home,Kitchen | Model 3 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Battery Operated with Digital Display (White) | Model X-Sense Smoke Detector Carbon Monoxide Detector Combo, 10-Year Battery Smoke Detector with Display, Standalone Model SC01, Single Pack | Model 2 in 1 CO & Smoke Detectors, Carbon Monoxide Detector,with 9V Battery,Digital Display, Smoke Detector Carbon Monoxide Detector Combo,Alarm for Home or Office,Easy to Install |
BrandFIRST ALERT | Brand X-Sense | Brand Kidde | Brand OLUNCLE | Brand Linsoal | Brand X-Sense | Brand TJTFJS |
Reviews | Reviews | Reviews | Reviews  | Reviews | Reviews | Reviews  |
Features | ||||||
Easy installation 9.6 | Easy installation 9.8 | Easy installation 9.6 | Easy installation 9.6 | Easy installation 9.1 | Easy installation 9.1 | Easy installation 9.3 |
Worth the money 8.9 | Worth the money 9.1 | Worth the money 8.9 | Worth the money 9.3 | Worth the money 8.9 | Worth the money 8.6 | Worth the money 8.6 |
Battery duration 9.3 | Battery duration 9.4 | Battery duration 9.3 | Battery duration 9.6 | Battery duration 9.1 | Battery duration 9.1 | Battery duration 9.9 |
Tech Specs | ||||||
customer reviews4.6 4.6 out of 5 stars 30, 269 ratings 4.6 out of 5 stars | customer reviews 4.6 4.6 out of 5 stars 3, 242 ratings 4.6 out of 5 stars | customer reviews 4.6 4.6 out of 5 stars 106 ratings 4.6 out of 5 stars | customer reviews 4.3 4.3 out of 5 stars 1, 443 ratings 4.3 out of 5 stars | customer reviews 4.8 4.8 out of 5 stars 27 ratings 4.8 out of 5 stars | customer reviews - | customer reviews 4.4 4.4 out of 5 stars 2, 152 ratings 4.4 out of 5 stars |
item weight 8.2 ounces | item weight 15.8 ounces | item weight 0.8 Pounds | item weight 1.15 pounds | item weight 1.63 pounds | item weight - | item weight 4.6 ounces |
power source Battery Powered | power source Battery Powered | power source Battery Powered | power source Battery Powered | power source Battery Powered | power source - | power source Battery Powered |
color White | color White | color White | color White 3 | color - | color - | color white-90301 |
batteries included Yes | batteries included No | batteries included - | batteries included Yes | batteries included Yes | batteries included - | batteries included Yes |
battery cell type Alkaline | battery cell type Lithium Metal | battery cell type - | battery cell type Zinc Carbon | battery cell type Alkaline | battery cell type - | battery cell type Zinc Carbon |
product dimensions 3.21 x 6.75 x 8.5 inches | product dimensions 5.7D x 5.7W x 2H | product dimensions - | product dimensions - | product dimensions 5 x 2 x 2 inches | product dimensions 5.7 x 5.7 x 2 inches 1.01 Pounds | product dimensions 4.94 x 4.64 x 1.81 inches |
batteries required Yes | batteries required No | batteries required - | batteries required Yes | batteries required Yes | batteries required - | batteries required Yes |
batteries 2 AA batteries required. included | batteries 2 CR123A batteries required. | batteries - | batteries - | batteries - | batteries 2 Lithium Metal batteries required. included | batteries 1 9V batteries required. included |
size One | size 1-Pack | size - | size 3 Packs | size 3 pack | size - | size - |
alarm Smoke, CO | alarm Audible | alarm Smoke and Carbon Monoxide Alarm | alarm - | alarm - | alarm - | alarm - |
style Standard Profile with Audible Alert | style Standalone Model | style - | style - | style - | style - | style Modern |
sensor type Photoelectric | sensor type Electrochemical, Photoelectric | sensor type Photoelectric, Electrochemical | sensor type - | sensor type - | sensor type - | sensor type - |
Available On | Available On  | Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.8
1FIRST ALERTFirst Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack
9.6 Easy installation9.3 Battery Duration8.9 worth the moneyMain highlights- Test/silence button for efficient testing to ensure alarm is working properly
- Provides reliable 2-in-1 protection against both smoke and carbon monoxide
- First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
- End-of-life warning lets you know when it’s time to replace the alarm
- Battery-operated alarm allows for easy installation and maintenance
-
9.7
2X-Sense
X-Sense 2-in-1 Smoke and Carbon Monoxide Detector Alarm (Not Hardwired), 10-Year Battery-Operated Dual Sensor Fire & CO Alarm, SC06, 1-Pack
9.8 Easy installation9.4 Battery Duration9.1 worth the moneyWhy we love it
Long-lasting 10-year battery.
Easy installation without wiring.
Quick response to smoke and CO.
-
9.6
3Kidde30% Off
Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 2 Pack
9.6 Easy installation9.3 Battery Duration8.9 worth the moneyMain highlights- TEST & HUSH BUTTON: Makes it easy to test the 5-inch combination detector and silence false alarms, should they occur.
- SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
- NO WIRING NEEDED: Operates on 2-AA alkaline batteries (included) providing easy installation, simply mount the bracket onto the ceiling and twist & click the 5-inch smoke & CO alarm into the bracket.
- ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, & FCC standards.
- BATTERY REPLACEMENT: Batteries should be replaced every 6 months, a low battery chirp alerts you when batteries need replacing.
- 3 LED NOTIFICATIONS: LED lights indicate alarm status, green = normal operation, amber = operating error, red = smoke or carbon monoxide detected & a loud 85-decibel alarm will sound.
- 2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective detector.
- 10-YEAR LIMITED WARRANTY: Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced.
Our ranking system
At BestChoice.com, our team curates a selection of top products from a vast array available online, using a sophisticated ranking system based on carefully defined criteria.While traditional hands-on testing has its merits, our use of AI technology offers distinct advantages. AI allows us to process and analyze vast amounts of data from multiple sources, providing a comprehensive view that goes beyond what manual testing can achieve. This approach enables us to deliver insights that are aligned with current trends and consumer preferences, ensuring our reviews are both relevant and up-to-date.
Features
Our AI-driven analysis examines key attributes, capabilities, and other critical factors tailored to each product category. This method allows us to assess effectiveness from various perspectives, ensuring a well-rounded evaluation.
Consumer Reviews
We aggregate and evaluate consumer feedback from across the internet, giving weight to ratings and reviews that reflect the most reliable insights. AI enhances this process by filtering and prioritizing data, offering a balanced view without the need for direct personal endorsements.
Popularity
Our system also considers the popularity of products, analyzing factors such as market presence, reputation, and user satisfaction. By leveraging AI, we capture a comprehensive picture of a product's standing in the market, which may not always be evident through traditional testing.
Value for money
AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.
