---
product_id: 702336308
title: "FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack , White"
brand: "fireangel"
price: "₨4394"
currency: SCR
in_stock: false
reviews_count: 5
category: "Fireangel"
url: https://www.desertcart.sc/products/702336308-fireangel-optical-smoke-alarm-with-10-year-sealed-for-life
store_origin: SC
region: Seychelles
---

# 10-year sealed battery life 8-hour low battery silence Optical smoke sensing tech FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack , White

**Brand:** fireangel
**Price:** ₨4394
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Stay ahead of danger with 10 years of silent, smart protection! 👁️

## Quick Answers

- **What is this?** FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack , White by fireangel
- **How much does it cost?** ₨4394 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/702336308-fireangel-optical-smoke-alarm-with-10-year-sealed-for-life)

## 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:** Temporarily mute low battery alerts for 8 hours, so you rest easy without annoying beeps disrupting your night.
- • **Effortless Upgrade:** Direct replacement for FireAngel ST-622/ST-620 models with easy installation on existing baseplates or new mounts.
- • **Set & Forget Safety:** 10-year sealed, tamper-proof battery ensures a decade of uninterrupted protection—no replacements, no hassle.
- • **Silent Night Testing:** Quiet test function lets you verify alarm functionality without disturbing your household or neighbors.
- • **Smart Smoke Detection:** Advanced optical sensor rapidly detects slow-burning fires while minimizing false alarms from cooking or vaping.

## Overview

The FireAngel FA6620 Optical Smoke Alarm Twin Pack offers cutting-edge optical sensing technology combined with a 10-year sealed battery for long-lasting, reliable fire detection. Designed as a direct replacement for popular FireAngel models, it features a quiet test function and an 8-hour low battery silence mode, ensuring minimal disruption while maximizing safety. Ideal for modern homes seeking premium, hassle-free fire protection backed by a 5-year warranty.

## Description

Designed as a replacement for the Fire Angel ST-622 / ST-620 smoke alarms, the FireAngel FA6620 Optical Smoke Alarm (available as a twin pack) is fitted with a 10-year lifetime sealed battery and 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 perfect for slow-burning fires with thick white smoke and less prone to false alerts from cooking fumes. It can still be subject to nuisance false alarms from steam and should not be placed near bathrooms or kitchens. 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 within 30 days. TEST/SILENCE To test your device, press the large test button for 5 seconds. A loud, high-pitched sound will verify the alarm is functioning correctly. During a known false alarm, press the test button for 5 seconds to temporarily silence the alarm for 8 minutes.

Review: Good quality
Review: I'm a loyal FireAngel customer and these smoke alarms maintain the brand's excellent reputation. The quality and reliability are second to none, which is exactly what you want from a safety device. Installation is straightforward and they're up and running quickly. The optical sensor technology works perfectly - sensitive enough to detect real smoke threats but smart enough to ignore false alarms like vaping, which is a huge advantage over cheaper detectors. The alarm tone strikes the perfect balance - loud enough to wake you and alert the household, but not so overwhelming that it's painful. There's no annoying constant beeping during normal operation either. The 10-year battery life is fantastic - set and forget peace of mind. The white finish looks clean and unobtrusive on the ceiling. Pro tip: pair these with magnetic mounting pads (as mentioned in my other reviews) for incredibly easy installation without drilling. These are premium smoke alarms that justify the price with superior performance and reliability. When it comes to fire safety, I wouldn't trust anything else. Highly recommended for anyone serious about home safety.

## Features

- The perfect replacement for FireAngel ST-622, ST-620 and ST-750 models, these alarms will fit on to the existing baseplates, or can be installed easily using the supplied bases and 2 screws
- With optical sensing technology smoke is rapidly detected as it enters the alarm chamber, for a quick reaction to slow burning fires
- The alarms come with sealed, tamper proof batteries that will last the lifetime of the alarms. It is recommended that smoke alarms are replaced every 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 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09W9WXBZL |
| Alarm | Smoke Alarm |
| Best Sellers Rank | #172,634 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #126 in Warning Alarms |
| Brand | Fireangel |
| Colour | White |
| Generic Name | Smoke Alarm |
| Included Components | 1 x Instruction Manual, 2 x Baseplate, 2 x Optical Smoke Alarms complete with Sealed Batteries |
| Item Weight | 138 g |
| Item model number | FA6620-R-T2 |
| Language | English |
| Manufacturer | FireAngel |
| Material | Plastic |
| Net Quantity | 2.0 Count |
| Number of Items | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 11.8D x 11.8W x 3.2H Centimeters |
| Sensor Type | optical |
| Style | New Gen Twin Pack |
| UPC | 816317006327 |

## Product Details

- **Alarm:** Smoke Alarm
- **Brand:** Fireangel
- **Colour:** White
- **Item Weight:** 138 Grams
- **Material:** Plastic
- **Number of Items:** 1
- **Power Source:** Battery Powered
- **Product Dimensions:** 11.8D x 11.8W x 3.2H Centimeters
- **Sensor Type:** optical
- **Style:** New Gen Twin Pack

## Images

![FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack , White - Image 1](https://m.media-amazon.com/images/I/319NRi+o-dL.jpg)
![FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack , White - Image 2](https://m.media-amazon.com/images/I/41AoNKZan4L.jpg)
![FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack , White - Image 3](https://m.media-amazon.com/images/I/41F4EI1-+sL.jpg)
![FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack , White - Image 4](https://m.media-amazon.com/images/I/41QKSHixxLL.jpg)
![FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery, FA6620-R-T2 (ST-622 / ST-620 replacement, new gen) - Twin Pack , White - Image 5](https://m.media-amazon.com/images/I/41RkqBm28IL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by N***A on 31 December 2025*

Good quality

### ⭐⭐⭐⭐⭐ Review
*by M***H on 15 September 2025*

I'm a loyal FireAngel customer and these smoke alarms maintain the brand's excellent reputation. The quality and reliability are second to none, which is exactly what you want from a safety device. Installation is straightforward and they're up and running quickly. The optical sensor technology works perfectly - sensitive enough to detect real smoke threats but smart enough to ignore false alarms like vaping, which is a huge advantage over cheaper detectors. The alarm tone strikes the perfect balance - loud enough to wake you and alert the household, but not so overwhelming that it's painful. There's no annoying constant beeping during normal operation either. The 10-year battery life is fantastic - set and forget peace of mind. The white finish looks clean and unobtrusive on the ceiling. Pro tip: pair these with magnetic mounting pads (as mentioned in my other reviews) for incredibly easy installation without drilling. These are premium smoke alarms that justify the price with superior performance and reliability. When it comes to fire safety, I wouldn't trust anything else. Highly recommended for anyone serious about home safety.

### ⭐⭐⭐⭐ Review
*by D***N on 25 December 2025*

Item left outside by delivery people. Fire alarms are excellent. Fit our original brackets

## Frequently Bought Together

- FireAngel Optical Smoke Alarm 2-Pack - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White
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- FireAngel Heat Alarm with 10 Year Sealed For Life Battery, FA6720-R (HT-630 replacement, new gen), White

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-01-31*