Pros
- •Battery replacement is convenient without needing to remove the unit from the ceiling.
- •Offers a simplified installation with matching screw holes and convenient sidoading battery door.
- •Loud alarm sound ensures effective alerting.
- •Higuality construction and effective performance.
- •Compact size and design make it easy to store in small spaces.
- •Users report positive experiences leading to repurchases.
- •Good value for the price with confidence in its longevity due to the 1ear battery life.
Cons
- •Instructions have small font, making them difficult to read.
- •Online manual lists a different model number, causing confusion.
- •Batteries included are not functional and are nearing expiration with a December 2023 date code.
- •Challenging to secure the unit properly due to a tricky cover and loose scren design.
- •The design could be more useriendly, such as including a ratcheting base.
- •The plastic locking mechanism requires a screwdriver, which is not intuitive for users.
Bottom Line
The First Alert SMI100 is a solid smoke alarm option, praised for its effective performance, convenient battery replacement, and compact design. While it offers good value and a positive user experience, potential buyers should be aware of the minor drawbacks, including less user-friendly instructions and the need for initial setup with non-functional batteries. Despite these issues, its quality construction and ease of installation make it a reliable choice for home safety needs.
Lowest at any Popular Retailer
$15.47 at amazonWhere to Buy
Prices last updated: July 17th 2025 11:13 pm
Get ShopSavvy
ShopSavvy is totally free and works on all popular phones and browsers
Download ShopSavvy App
Compare prices for anything in real-time, set price alerts, watch for deals by keyword, and much more
Install ShopSavvy Browser Extension
Compare and track prices automatically while you shop online at thousands of websites.
Footer 1
Subscribe for Updates
Get the latest news, and updates on ShopSavvy. You'll be glad you did!