---
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: "€ 59.16"
currency: EUR
in_stock: true
reviews_count: 6
category: "Fireangel"
url: https://www.desertcart.pt/products/432278131-fireangel-optical-smoke-alarm-with-5-year-replaceable-batteries-fa6615
store_origin: PT
region: Portugal
---

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

**Brand:** fireangel
**Price:** € 59.16
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of danger with smart, silent protection ⏳

## 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?** € 59.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/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

- • **Long-Life Power:** Equipped with 5-year replaceable AA batteries for hassle-free maintenance
- • **Sleep Easy Mode:** Silence low battery alerts for 8 hours without compromising safety
- • **Trusted Durability:** Backed by a 5-year manufacturer warranty and rigorous quality testing
- • **Seamless Replacement:** Fits existing FireAngel baseplates for effortless upgrade
- • **Swift Optical Detection:** Sees smoke early for rapid alerts on slow-burning fires

## Overview

The FireAngel Optical Smoke Alarm Twin Pack (FA6615) offers advanced photoelectric sensing for fast detection of slow-burning fires, powered by 5-year replaceable AA batteries and designed for easy replacement of older FireAngel models. Featuring a 10-year sensor life, sleep easy low battery silencing, and a 5-year warranty, it combines reliability with user-friendly innovation to keep your home safe and your peace of mind intact.

## 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: جيد جدا - شكرا علي سرعة الاستجابه
Review: Good but doesn't like rechargeable batteries - Bought this version to avoid the rectangular batteries so that we could use rechargeable ones. Sadly the rechargeable desertcart AAs started the alarm beeping after only a couple of days. Guess this is because of the possible lower voltage of rechargeable ones, but was a shame as now need to buy ones to discard every so often. Unsure as to how long the provided energizer batteries will last. Hopefully a while.

## 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 |
| Alarm | Smoke Alarm |
| Best Sellers Rank | #14,914 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #17 in Smoke Alarms |
| Brand | Fireangel |
| Built-In Media | 1 x Instruction Manual, 2 x Baseplate, 2 x Optical Smoke Alarms, 4 x AA Batteries |
| Color | White |
| Colour | White |
| Customer Reviews | 4.6 out of 5 stars 387 Reviews |
| Enclosure Material | Plastic |
| Item Dimensions D x W x H | 10D x 10W x 10H millimeters |
| Item Type Name | Smoke Alarm |
| Item Weight | 185 Grams |
| Item weight | 185 Grams |
| Manufacturer | FireAngel |
| Mfr Part Number | FA6615-R-T2 |
| Model Number | FA6615-R-T2 |
| Number of Items | 2 |
| Power Source | Battery Powered |
| Power source | Battery Powered |
| Product Style | 5 Year Replaceable Battery (Better) |
| Product dimensions | 10D x 10W x 10H millimeters |
| Sensor Type | Photoelectric |
| Style | 5 Year Replaceable Battery (Better) |
| UPC | 816317006341 |
| Unit Count | 2 Count |

## 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

### ⭐⭐⭐⭐⭐ جيد جدا
*by ا***س on 8 August 2024*

شكرا علي سرعة الاستجابه

### ⭐⭐⭐⭐ Good but doesn't like rechargeable batteries
*by N***T on 14 January 2025*

Bought this version to avoid the rectangular batteries so that we could use rechargeable ones. Sadly the rechargeable Amazon AAs started the alarm beeping after only a couple of days. Guess this is because of the possible lower voltage of rechargeable ones, but was a shame as now need to buy ones to discard every so often. Unsure as to how long the provided energizer batteries will last. Hopefully a while.

### ⭐⭐⭐⭐⭐ good battery life
*by W***. on 22 June 2026*

easy to install look good thanks

## 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 Portugal*
*Store origin: PT*
*Last updated: 2026-09-12*