---
product_id: 602345752
title: "First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack"
brand: "first alert"
price: "S$67"
currency: SGD
in_stock: true
reviews_count: 13
category: "First Alert"
url: https://www.desertcart.sg/products/602345752-first-alert-smi100-battery-operated-smoke-alarm-2-pack
store_origin: SG
region: Singapore
---

# End-of-life alert Front-access battery Precision Detection tech First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack

**Brand:** first alert
**Price:** S$67
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay safe, stay smart—because your peace of mind deserves precision.

## Quick Answers

- **What is this?** First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack by first alert
- **How much does it cost?** S$67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/602345752-first-alert-smi100-battery-operated-smoke-alarm-2-pack)

## 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:** Know exactly when it’s time to upgrade for uninterrupted safety.
- • **Loud & Reliable Alarm:** Powerful sound designed to wake even the deepest sleepers—because safety can’t wait.
- • **Battery-Operated Convenience:** Easy, wire-free installation anywhere in your home—no electrician needed.
- • **Precision Detection Technology:** Reduces false alarms from cooking so you stay worry-free and focused.
- • **Front-Access Battery Compartment:** Swap batteries in seconds without uninstalling the alarm.

## Overview

The First Alert SMI100 is a 2-pack battery-operated smoke alarm featuring advanced Precision Detection technology that minimizes nuisance alarms while providing early fire warnings. It includes front-access battery compartments for easy maintenance, an end-of-life alert for timely replacement, and comes with 9V batteries pre-installed for quick setup. Trusted by thousands, it ranks #1 in Smoke Detectors & Fire Alarms for reliable home safety.

## 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: Works great - Good smoke alarm, it comes with the 9 volt battery and is very easy to install.
Review: These work so well, they know when I'm making toast - 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.

## 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 | B0CJLN45JZ |
| Alarm | Smoke |
| Batteries | 1 9V batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Zinc Carbon |
| Best Sellers Rank | #45 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 (23,011) |
| Date First Available | September 21, 2023 |
| Included Components | 9V Alkaline Battery |
| Item Package Quantity | 1 |
| Item Weight | 9.6 ounces |
| Item model number | SMI100 |
| Manufacturer | Resideo |
| Number of Items | 2 |
| Part Number | SMI100 |
| Pattern | SMI100 |
| Power Source | Battery Powered |
| Product Dimensions | 5.6 x 5.6 x 1.9 inches |
| Sensor Type | Ionization |
| Size | 2-Pack |
| Style | Precision Detection |
| UPC | 029054022400 |

## Product Details

- **Alarm:** Smoke
- **Brand:** First Alert
- **Color:** White
- **Item Weight:** 9.6 ounces
- **Manufacturer:** Resideo
- **Number of Items:** 2
- **Power Source:** Battery Powered
- **Sensor Type:** Ionization
- **Style:** Precision Detection
- **UPC:** 029054022400

## Images

![First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack - Image 1](https://m.media-amazon.com/images/I/61G4T1kDyUL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by M***E on December 30, 2025*

Good smoke alarm, it comes with the 9 volt battery and is very easy to install.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Worth the money
*by K***Y on January 7, 2026*

Wonderful! Easy to install and the detector easily attaches to the base. Spending a little more is well worth not having installation issues!!!

## Frequently Bought Together

- First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack
- Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
- Amazon Basics 8-Pack 9V Alkaline Batteries, 5-Year Shelf Life - for Smoke/CO Detector, Electronics & Audio

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**Shop now:** [https://www.desertcart.sg/products/602345752-first-alert-smi100-battery-operated-smoke-alarm-2-pack](https://www.desertcart.sg/products/602345752-first-alert-smi100-battery-operated-smoke-alarm-2-pack)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-09*