---
product_id: 604424417
title: "First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack"
brand: "first alert"
price: "₨753"
currency: SCR
in_stock: true
reviews_count: 13
category: "First Alert"
url: https://www.desertcart.sc/products/604424417-first-alert-smoke-alarm-battery-operated-detector-with-test-silence
store_origin: SC
region: Seychelles
---

# Battery-operated, easy install Precision Detection tech Front-access battery compartment First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack

**Brand:** first alert
**Price:** ₨753
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of danger with precision and ease!

## Quick Answers

- **What is this?** First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack by first alert
- **How much does it cost?** ₨753 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/604424417-first-alert-smoke-alarm-battery-operated-detector-with-test-silence)

## Best For

- first alert enthusiasts

## Why This Product

- Trusted first alert brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **End-of-Life Warning:** Smart alert tells you exactly when it’s time to upgrade, so you never compromise safety.
- • **Test & Silence Button:** Instantly verify functionality or silence nuisance alarms with a single press.
- • **Hassle-Free Battery Operation:** Comes with a 9V alkaline battery included for easy, tool-free installation and maintenance.
- • **Precision Detection Technology:** Advanced sensing reduces false alarms, so you stay safe without the noise.
- • **User-Friendly Front Battery Access:** Swap batteries in seconds without uninstalling—because your time is valuable.

## Overview

The First Alert SMI100 is a battery-operated smoke alarm featuring advanced Precision Detection technology that minimizes false alarms while providing early fire warnings. Designed for effortless installation, it includes a front-access battery compartment and a test/silence button for user convenience. Equipped with an end-of-life warning, this reliable 9V-powered detector ensures your home safety is always up to date.

## Description

The First Alert SMI100 Battery-Operated Smoke Alarm is equipped with First Alert's Precision Detection advanced sensing technology and meets new industry standards. This battery-operated smoke alarm is easy to install and the front access battery compartment makes for easy battery replacements.

Review: Replaced Exp First Alert Smoke Detectors w/New - I just installed these 2 First Alert smoke detectors, so I can’t give you a long time use review, but I’m happy with my purchase. These replaced two 10 year-old similar First Alert smoke detectors that had reached their expiration date. I was very pleased with those, which is why I looked for the same smoke detectors. I couldn’t find the exact same ones, so I replaced with these, which look similar and are basic like the first pair. Although the size of the new ones are a little bit smaller than the ones they replaced, I was pleased to find that the new brackets fit the 2 screws I already had in the walls from the old ones. I was concerned that I would be patching and drilling, but I didn’t have to, so installation was easy peezy. The other thing that is different on the new ones is that the batteries are 9 V versus the AAs for the old ones. I prefer AAs because it’s a battery that I always have around the house and they are easy to come by and inexpensive, relatively speaking. However, the new detectors came with batteries, so I don’t have to worry about replacing them for another year.
Review: Good product - Easy to install & works very well

## Features

- 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.
- Battery-operated alarm allows for easy installation and maintenance
- Front access battery compartment makes for easy battery replacements
- End-of-life warning lets you know when it’s time to replace the alarm
- Test/silence button for efficient testing to ensure alarm is working properly

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CJMP7WHH |
| Alarm | Smoke Alarm |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #53 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Smoke Detectors & Fire Alarms |
| Brand | First Alert |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (23,175) |
| Date First Available | September 22, 2023 |
| Included Components | 9V Alkaline Battery |
| Item Package Quantity | 1 |
| Item Weight | 11.2 ounces |
| Item model number | SMI100 |
| Manufacturer | Resideo |
| Number of Items | 1 |
| Operating Humidity | 10-95% RH |
| Pattern | SMI100 |
| Power Source | Battery Powered |
| Product Dimensions | 5.4"D x 5.4"W x 1.9"H |
| Sensor Type | Ionization |
| Size | 1-Pack |
| Style | Precision Detection |
| UPC | 029054022387 |

## Product Details

- **Alarm:** Smoke Alarm
- **Brand:** First Alert
- **Color:** White
- **Item Weight:** 0.7 Pounds
- **Number of Items:** 1
- **Operating Humidity:** 10-95% RH
- **Power Source:** Battery Powered
- **Product Dimensions:** 5.4"D x 5.4"W x 1.9"H
- **Sensor Type:** Ionization
- **Style:** Precision Detection

## Images

![First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack - Image 1](https://m.media-amazon.com/images/I/61GUtvUotTL.jpg)

## Available Options

This product comes in different **Pattern, Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Replaced Exp First Alert Smoke Detectors w/New
*by N***F on February 1, 2026*

I just installed these 2 First Alert smoke detectors, so I can’t give you a long time use review, but I’m happy with my purchase. These replaced two 10 year-old similar First Alert smoke detectors that had reached their expiration date. I was very pleased with those, which is why I looked for the same smoke detectors. I couldn’t find the exact same ones, so I replaced with these, which look similar and are basic like the first pair. Although the size of the new ones are a little bit smaller than the ones they replaced, I was pleased to find that the new brackets fit the 2 screws I already had in the walls from the old ones. I was concerned that I would be patching and drilling, but I didn’t have to, so installation was easy peezy. The other thing that is different on the new ones is that the batteries are 9 V versus the AAs for the old ones. I prefer AAs because it’s a battery that I always have around the house and they are easy to come by and inexpensive, relatively speaking. However, the new detectors came with batteries, so I don’t have to worry about replacing them for another year.

### ⭐⭐⭐⭐⭐ Good product
*by W***L on February 10, 2026*

Easy to install & works very well

### ⭐⭐⭐⭐⭐ These work so well, they know when I'm making toast
*by D***V on December 29, 2025*

Great value, high quality, function well - ask my toast how I know. They are loud enough to wake the dead, which is good because I am a heavy sleeper. They fit in the same frame as my old smoke detectors.

## Frequently Bought Together

- First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack
- Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
- Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sc/products/604424417-first-alert-smoke-alarm-battery-operated-detector-with-test-silence](https://www.desertcart.sc/products/604424417-first-alert-smoke-alarm-battery-operated-detector-with-test-silence)

---

*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-22*