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- First Alert Battery Smoke Alarm | SMI100
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Item #:
91185747
First Alert Battery Smoke Alarm | SMI100
89% of respondents would recommend this to a friend
Item #:
91185747
XCD 71
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Order now and get it around Tuesday, September 08
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This battery-operated smoke alarm is easy to install and provides early warning in the event of a home fire emergency.
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What Stands Out
Dual-Sensor Technology
Equipped with both photoelectric and ionization sensors, this alarm detects a wide range of fires, providing enhanced safety for homes and businesses.
Battery Powered
No electrical wiring required, allowing for easy installation in any location. Ideal for renters or homes without existing smoke detector systems.
Frustration-Free Packaging
Designed for an easy unboxing experience, minimizing waste and frustration, making it simple for users to install and utilize the smoke alarm immediately.
Product Details
| Power Source | Battery Powered |
| Alarm | Smoke Alarm |
| Sensor Type | Ionization |
| Operating Humidity | 10-95% RH |
| Product Style | Precision Detection |
| Color | White |
| Item Dimensions D x W x H | 5.4"D x 5.4"W x 1.9"H (13.7 x 13.7 x 4.8 cm) |
| Item Weight | 11.2 ounces (317.52 grams) |
| Brand | First Alert |
| Model Number | SMI100 |
| Unit Count | 1 Count |
| Number of Items | 1 |
| Manufacturer | Resideo |
| UPC | 029054022387 |
| Built-In Media | 9V Alkaline Battery |
| Item Type Name | Smoke Alarm |
| Mfr Part Number | SMI100 |
| Style | Precision Detection |
| Product Dimensions (L x W x H) | 5.4"D x 5.4"W x 1.9"H (13.7 x 13.7 x 4.8 cm) |
Dangerous Goods
To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.
Who Should Buy?
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Homeowners
Ideal for homeowners seeking reliable smoke detection with dual sensor technology for increased safety in their residences.
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Apartment Dwellers
Perfect for apartment residents needing a compact and battery-powered smoke alarm that easily fits in small spaces.
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Families with Children
Great choice for families wanting peace of mind knowing their smoke alarm can detect multiple types of fires quickly.
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Commercial Use
Not suitable for commercial environments where advanced fire safety systems and professional monitoring services are required.
Product Description
First Alert Battery Smoke Alarm | SMI100
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What are the key features of the First Alert SMI100 smoke alarm?
Answer: The First Alert SMI100 smoke alarm boasts advanced photoelectric sensor technology that reliably detects slow-smoldering fires. It features a battery-operated design, which means you can install it anywhere without worrying about hardwired connections. With its sleek, compact design, this alarm fits seamlessly into any home décor. Additionally, the unit includes a low-battery indicator that alerts you when it's time to replace the batteries, ensuring your safety is never compromised. It's perfect for various settings, including bedrooms, kitchens, or hallways. -
Question:
How do I install the First Alert SMI100 smoke alarm?
Answer: Installing the First Alert SMI100 is straightforward and requires no special tools. Simply use the included mounting bracket to secure the unit to the wall or ceiling. Ensure the smoke alarm is placed at least 10 feet away from cooking appliances to prevent false alarms. For optimal performance, install it in areas where smoke might accumulate, such as kitchens, corridors, and near sleeping areas. This easy-to-follow installation method helps ensure your smoke alarm is positioned to provide the earliest warnings in the event of a fire. -
Question:
How often should I test the First Alert SMI100 smoke alarm?
Answer: It is recommended to test your First Alert SMI100 smoke alarm at least once a month. To test, press the test button on the unit. This ensures that the alarm is functioning properly and that the battery is in good condition. Regular testing is crucial, especially in environments with high dust or humidity, which can affect performance. Staying proactive with regular tests ensures your smoke alarm is always ready to provide alerts in potential fire situations. -
Question:
What type of battery does the First Alert SMI100 require?
Answer: The First Alert SMI100 smoke alarm requires two AA batteries for operation. These batteries are readily available and ensure the unit functions effectively while providing consistent protection. Always keep a spare set of batteries on hand to replace them as soon as the low-battery indicator alerts you. This level of preparedness guarantees that your smoke alarm remains operational, enhancing your home’s safety against fire hazards. -
Question:
Does the First Alert SMI100 have any special features?
Answer: Yes, the First Alert SMI100 smoke alarm features a photoelectric sensor that is excellent for detecting smoldering fires, which can burn slower and produce more smoke. Additionally, it is equipped with a hush feature that temporarily silences false alarms, making it user-friendly during cooking mishaps. These features are particularly beneficial for households with children or pets, providing peace of mind without compromising safety. -
Question:
How does the First Alert SMI100 compare to other smoke alarms?
Answer: The First Alert SMI100 stands out due to its advanced photoelectric technology, which is more effective in identifying smoldering fires compared to traditional ionization smoke alarms. Its battery-operated nature allows versatile installation options without the need for hardwiring. Moreover, its compact design blends well with home aesthetics while ensuring comprehensive fire safety. This combination of features makes it a reliable choice among smoke alarms, providing enhanced safety for families. -
Question:
Can the First Alert SMI100 be interconnected with other alarms?
Answer: The First Alert SMI100 is designed as a standalone smoke alarm and does not support interconnectivity with other alarms or devices. However, using multiple units in different areas of your home creates a comprehensive safety net. This setup allows for multiple points of detection, ensuring you're alerted no matter where a smoke event occurs in your home, significantly enhancing your overall safety. -
Question:
Is the First Alert SMI100 suitable for use in all areas of the home?
Answer: Yes, the First Alert SMI100 is suitable for various areas of the home, including kitchens, living rooms, and bedrooms. It is important, however, to avoid placing it directly over cooking appliances to minimize false alarms from smoke. Installing smoke alarms in bedrooms and hallways ensures that you have adequate warning in the event of a fire during sleep, making it an essential part of your home safety plan. -
Question:
What is the lifespan of the First Alert SMI100 smoke alarm?
Answer: The First Alert SMI100 smoke alarm has a typical lifespan of up to 10 years, depending on usage and environmental factors. After this period, it is advisable to replace the smoke alarm to ensure optimal safety. The unit includes a 'replace by' date on its packaging, which is helpful to keep track of its age. Regularly checking and replacing your smoke alarm is vital for sustaining effective fire protection in your home. -
Question:
Where can I buy First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack in Anguilla?
Answer: You can purchase the First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack from Ubuy in Anguilla. Ubuy offers a convenient online shopping platform with various home safety products delivered directly to your doorstep, making it easy to ensure your home is equipped with reliable smoke alarms.
First Alert Smoke Detectors & Fire Alarms SMI100 Editorial Review
### Editorial Review of First Alert 1039879 Smoke Alarm and Carbon Monoxide Detector The First Alert 1039879 Smoke Alarm and Carbon Monoxide Detector has garnered generally positive feedback from customers, particularly for its ease of installation and reliability. Many users appreciate its straightforward mounting process where a user can simply attach a base or utilize existing mounts from prior alarms, thus ensuring a hassle-free replacement without extensive work—especially beneficial for those with high ceilings. The battery operation is seen as practical, with a built-in 10-year battery that eliminates the need for frequent changes, although some users expressed worries about the potential risks associated with long-lasting, non-replaceable batteries. Customers feel reassured by the dual-sensor design, which supports both photoelectric and ionization detection, addressing a wider range of fire types compared to single-sensor models. Users have reported that these alarms perform reliably without false alarms, providing a sense of security, especially when recalling disappointing experiences with previous brands. One detailed review highlighted the unfortunate experience with Kidde smoke detectors that failed to respond during crucial moments, ultimately leading the reviewer to see First Alert as a trustworthy alternative. While some buyers regard the product as somewhat pricey, the value of comprehensive safety and dependable performance seems to override concerns about cost. Overall, the First Alert 1039879 combines convenience and effectiveness, making it a recommended choice for those looking to upgrade or replace older smoke detectors in their homes. ### Pros and Cons **
Customer Reviews & Ratings
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Pros
- Easy installation and mounting process.
- Dual-sensor design for enhanced fire detection.
- Reliable performance with no false alarms reported.
- Built-in 10-year battery eliminating frequent replacements.
- Can utilize existing mounts from previous First Alert alarms.
Cons
- May be perceived as pricier than other options.
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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SAO JOHN
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“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
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Order now and get it around Tuesday, September 08
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Features & Benefits
- Advanced sensing technology reduces nuisance alarms.
- Easy installation with battery-operated design.
- Front access battery compartment for quick replacements.
- End-of-life warning indicator for timely replacements.
- Includes test/silence button for efficient functionality.
- Meets new industry standards for enhanced safety.
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