---
product_id: 432278131
title: "Fireangel Optical Smoke Alarm with 5 Year Replaceable Batteries, FA6615 R T2 ST 625 replacement, new gen Twin Pack, White"
brand: "fireangel"
price: "C$3964"
currency: NIO
in_stock: true
reviews_count: 6
category: "Fireangel"
url: https://www.desertcart.ni/products/432278131-fireangel-optical-smoke-alarm-with-5-year-replaceable-batteries-fa6615
store_origin: NI
region: Nicaragua
---

# 10-year sensor lifespan Optical sensing tech for fast smoke detection 5-year replaceable AA batteries Fireangel Optical Smoke Alarm with 5 Year Replaceable Batteries, FA6615 R T2 ST 625 replacement, new gen Twin Pack, White

**Brand:** fireangel
**Price:** C$3964
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay safe, stay savvy — smoke detection that keeps up with your lifestyle! 🔋

## Quick Answers

- **What is this?** Fireangel Optical Smoke Alarm with 5 Year Replaceable Batteries, FA6615 R T2 ST 625 replacement, new gen Twin Pack, White by fireangel
- **How much does it cost?** C$3964 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/432278131-fireangel-optical-smoke-alarm-with-5-year-replaceable-batteries-fa6615)

## Best For

- fireangel enthusiasts

## Why This Product

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

## Key Features

- • **Sleep Easy Mode:** Silence low battery chirps for 8 hours without compromising safety—peaceful nights guaranteed.
- • **Long-Lasting Power:** Equipped with 5-year replaceable AA batteries—never get caught off guard by dead alarms.
- • **Swift Smoke Detection:** Optical sensor spots slow-burning fires early, reducing false alarms from cooking.
- • **Effortless Installation:** Simple baseplate swap fits multiple FireAngel models, install in minutes with just 2 screws.
- • **Trusted Quality & Warranty:** Backed by rigorous testing and a 5-year manufacturer’s warranty for ultimate peace of mind.

## Overview

The FireAngel Optical Smoke Alarm Twin Pack (FA6615-R-T2) offers advanced optical smoke sensing technology for rapid detection of slow-burning fires. Featuring 5-year replaceable AA batteries and a 10-year sensor lifespan, it ensures long-term reliability. Designed for easy installation with compatible baseplates, it includes a Sleep Easy mode to mute low battery alerts temporarily. Rigorously tested and backed by a 5-year warranty, this alarm is a smart, dependable upgrade for modern homes.

## Description

Designed as a replacement for the ST-625 model, the FireAngel FA6615 smoke alarm (twin pack) has a 10-year sensor, is fitted with 2 x AA 5-year replaceable batteries and is equipped with an optical sensing chamber, providing a fast response to slow-burning fires. ENHANCED SENSING The optical smoke sensing chamber works by 'seeing' smoke as it enters the alarm—making it ideal for slow-burning fires with thick white smoke and less prone to false alerts from cooking fumes. SLEEP EASY If a low battery alert occurs at night, you can silence the smoke detector for 8 hours by pressing the test button. The alarm will be muted, but the red LED will continue to flash. The alarm will still detect smoke during Sleep Easy mode. Replace the batteries ASAP. TEST/SILENCE To test your device, press the large test button. The alert will sound to verify that the alarm is functioning correctly. During a known false alarm, press the test button to temporarily silence the alarm for 10 minutes.

Review: شكرا علي سرعة الاستجابه
Review: I had previously two smoke detectors from FireAngle which had a non-replaceable battery. Unfortunately the life span on them was not the five - ten years as stated (more like three). So when one started to "chirp" we replaced them both with this model. I am happy with this replacement as the batteries (two AA) are able to be replaced! The slight downside is that the mounting bracket is smaller than the previous model, meaning that a little bit of filler and paint was required to tidy up the area around the previous drill holes. Overall, for the cost, ease of installation, coupled with the fact the batteries are replaceable, I am very pleased with this purchase. Definitely recommended.

## Features

- The perfect replacement for FireAngel ST-625 models with a simple swap of the baseplates, or for ST-622, ST-620 and ST-750 models using the existing baseplate
- With optical sensing technology smoke is rapidly detected as it enters the alarm chamber, for a quick reaction to slow burning fires
- The alarms are supplied with 4 x AA batteries which can be replaced upon hearing the low battery warning, it is recommended you replace the alarms after 10 years
- Featuring a quiet test function which means you're less likely to wake up loved ones or disturb the neighbours when testing your alarms
- Give yourself vital time to replace the batteries in your alarm by silencing low battery warnings for 8 hours using the sleep easy feature.Suitable for homes in England and Wales. Not suitable for Scottish homes under the new regulations.FireAngel alarms are rigorously tested to ensure unrivalled quality and longevity and come with a 5 year manufacturer's warranty for peace of mind.Included components: 1 x instruction manual

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09WB3FQNK |
| ASIN  | B09WB3FQNK |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #1,203 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Smoke Alarms |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (953) |
| Customer reviews | 4.6 4.6 out of 5 stars (953) |
| Cutting Diameter | 118 Millimeters |
| Date First Available | 27 March 2022 |
| Date First Available  | 27 March 2022 |
| Included components | 1 x Instruction Manual, 2 x Baseplate, 2 x Optical Smoke Alarms, 4 x AA Batteries |
| Installation Method | Install in a matter of minutes with only 2 screws required (not included) to secure the baseplate, then twist the alarm in to place |
| Item Package Quantity | 1 |
| Item Weight | 185 g |
| Item diameter | 118 Millimeters |
| Item model number | FA6615-R-T2 |
| Item model number  | FA6615-R-T2 |
| Language  | English |
| Manufacturer | FireAngel |
| Manufacturer  | FireAngel |
| Material | Plastic |
| Part number | FA6615-R-T2 |
| Pattern | Single |
| Power source type | Battery Powered |
| Product Dimensions  | 1 x 1 x 1 cm; 185 g |
| Shape | Circular |
| Size | Twin Pack |
| Style | 5 Year Replaceable Battery (Better) |

## Product Details

- **Brand:** Fireangel
- **Colour:** White
- **Power source:** Battery Powered
- **Product dimensions:** 3.2D x 11.8W x 11.8H centimeters
- **Style:** 5 Year Replaceable Battery (Better)

## Images

![Fireangel Optical Smoke Alarm with 5 Year Replaceable Batteries, FA6615 R T2 ST 625 replacement, new gen Twin Pack, White - Image 1](https://m.media-amazon.com/images/I/51iqUjgQxSL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by ا***س on 8 August 2024*

شكرا علي سرعة الاستجابه

### ⭐⭐⭐⭐⭐ Review
*by R***R on 19 August 2021*

I had previously two smoke detectors from FireAngle which had a non-replaceable battery. Unfortunately the life span on them was not the five - ten years as stated (more like three). So when one started to "chirp" we replaced them both with this model. I am happy with this replacement as the batteries (two AA) are able to be replaced! The slight downside is that the mounting bracket is smaller than the previous model, meaning that a little bit of filler and paint was required to tidy up the area around the previous drill holes. Overall, for the cost, ease of installation, coupled with the fact the batteries are replaceable, I am very pleased with this purchase. Definitely recommended.

### ⭐⭐⭐⭐⭐ Review
*by L***B on 31 March 2021*

Excellent value, easy to fit also comes with batteries and fixing so all ready to be fitted and working straight away.

## Frequently Bought Together

- FireAngel Optical Smoke Alarm with 5 Year Replaceable Batteries, FA6615-R-T2 (ST-625 replacement, new gen) - Twin Pack
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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-04*