---
product_id: 419152260
title: "FireAngel Optical Smoke Alarm - 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"
brand: "fireangel"
price: "¥7399"
currency: JPY
in_stock: true
reviews_count: 8
category: "Fireangel"
url: https://www.desertcart.jp/products/419152260-fireangel-optical-smoke-alarm-fa6620-10-year-battery-smoke-alarms
store_origin: JP
region: Japan
---

# 10-year sealed battery lifespan Quick twist & lock installation Advanced optical smoke sensor FireAngel Optical Smoke Alarm - 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

**Brand:** fireangel
**Price:** ¥7399
**Availability:** ✅ In Stock

## Summary

> 🚨 Fire safety that works as hard as you do—smart, sleek, and set for 10 years!

## Quick Answers

- **What is this?** FireAngel Optical Smoke Alarm - 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 by fireangel
- **How much does it cost?** ¥7399 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/419152260-fireangel-optical-smoke-alarm-fa6620-10-year-battery-smoke-alarms)

## 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

- • **Sleek & Subtle Design:** Clean white finish blends seamlessly with your ceiling, keeping your home stylish while safeguarding what matters most.
- • **Certified Peace of Mind:** CE & UKCA marked and BS EN 14604:2005+AC:2008 certified, backed by a 5-year warranty for trusted, long-term home safety.
- • **Effortless Installation:** Removable baseplate with push-and-twist locking means you’re protected in minutes—perfect for busy professionals.
- • **Precision Optical Sensing:** Detects slow-burning fires early by 'seeing' thick white smoke, minimizing false alarms from cooking fumes for smarter safety.
- • **Set & Forget 10-Year Battery:** Enjoy a decade of uninterrupted fire protection with a tamper-proof sealed lithium battery—no replacements, no hassle.

## Overview

The FireAngel FA6620 Optical Smoke Alarm features an advanced photoelectric sensor designed to detect slow-burning fires with thick smoke, reducing false alarms from cooking fumes. It includes a sealed-for-life 10-year lithium battery, ensuring a decade of reliable protection without battery changes. Easy to install with a removable baseplate compatible with previous models, it carries CE and UKCA certifications and a 5-year warranty, making it a trusted choice for domestic fire safety.

## Description

From the manufacturer Fire Safety At FireAngel, we're dedicated to protecting and improving our customers’ lives by creating innovative, cutting-edge fire safety technology that is both practical and accessible. The FireAngel FA6620-R Optical Smoke Alarm has been designed to make protecting your home simple, with an easy installation process, fewer false alarms, and rigorous testing. OPTICAL SENSOR: The FA6620’s optical smoke-sensing chamber works by 'seeing' smoke as it enters the alarm, making it ideal for slow-burning fires that produce thick, white smoke. Whilst it is less prone to false alarms from cooking fumes, it can still be triggered by steam. Not suitable for kitchens or bathrooms. SEALED-FOR-LIFE BATTERY: The FA6620 smoke detector has a 10-year, tamper-proof battery that will last the lifetime of the alarm. A red operational LED will flash, and an audible beep will alert you when the device needs replacing. FOR DOMESTIC PREMISES ONLY: Suitable for domestic premises, including leisure accommodation vehicles (mobile homes and caravans). Not suitable for commercial properties. Designed to replace the ST-622 and ST-620 smoke alarms, the baseplate is identical to the ST-622, making replacements quick and easy. FireAngel: Smarter solutions for safer homes. Early Warning System Smoke alarms provide an essential early warning system for potential house fires. The FA6620 smoke alarm holds both CE and UKCA marks, has been rigorously third-party tested, and is certified to BS EN 14604:2005+AC:2008. Sleep Easy To test your device, press the large test button. A loud, high-pitched sound will verify that the alarm is functioning correctly. In a known false alarm, press and hold the test button to temporarily silence the alarm for 10 minutes. If a low battery alert occurs at night, you can silence the smoke detector for 8 hours by pressing the test button. Safety Guidelines The FA6620 is suitable for the landing, hallway, bedroom, living room and dining room. Smoke alarms should be sited at least 300 mm from light fittings and walls, and ideally as central as possible in the room. Avoid installing near kitchens or bathrooms. Safety First What should I do if my smoke alarm sounds? In the event of a smoke alarm sounding STAY CALM: Don’t panic, take immediate action to ensure your own safety and that of others. CHECK FOR SMOKE OR FIRE: Look for visible smoke or flames. If you see either, evacuate immediately. EVACUATE: Leave the premises as quickly as possible using the nearest exit. Do not use lifts. Take the stairs. Ensure everyone is accounted for and exits safely. CLOSE THE DOORS: Close doors behind you as you leave to slow the spread of smoke. CALL 999: Once outside, call the emergency services, providing the operator with your location and any details about the fire. DO NOT RE-ENTER: Do not go back into the building until it has been declared safe by the fire service. About Us We pride ourselves on product reliability and quality. Since 1998, we’ve deployed over 80 million safety products, protecting over 25 million homes nationwide. Sustainability We’re committed to reducing our impact on the planet; that’s why we've reduced the plastic in our packaging and have unique products that use less energy. The FireAngel range In addition to our smoke alarms for the home, we offer a wide range of other safety products designed to protect you and your family. Choose from smart and wireless devices, as well as standard fire, carbon monoxide (CO), and heat alarms.

Review: Longevity of 1st pair of around 15 years - Arrived well packed & tested & fitted. This is 5th one, 1st 2 lasted around 15 years with the sealed Lithium batteries, really good. This is to replace 1 of replacements as it malfunctioned, but will be replaced/ refunded as 5 year warranty which is great, peace of mind
Review: Excellent smoke alarms - FireAngel quality you can trust - 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

- SMOKE DETECTORS FOR HOME: The optical smoke alarm makes protecting your home simple. Its optical sensing chamber 'sees' smoke as it enters the alarm, providing a fast response to slow burning fires with thick white smoke.
- FEWER NUISANCE ALARMS: The advanced optical sensor ensures the FireAngel smoke alarm is less prone to false alerts from cooking fumes. Avoid placing near bathrooms or kitchens.
- 10-YEAR BATTERY: Each smoke alarm is fitted with a 10-year sealed battery, offering protection for the lifetime of the device without needing to change the batteries.
- EASY INSTALLATION: Fitted with a removable base plate, secure it to the ceiling using the screws provided. Push and twist to secure the device. The base plate is identical to the ST622, making replacements quick and easy.
- SAFETY ASSURED: The FA6620 smoke alarm holds CE and UKCA marks and is certified to BS EN 14604:2005+AC:2008. Suitable for domestic premises, including leisure accommodation vehicles, it comes with a 5-year warranty.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09V5C7GHF |
| Alarm | Smoke Alarm |
| Best Sellers Rank | 38 in DIY & Tools ( See Top 100 in DIY & Tools ) 1 in Smoke Alarms |
| Brand | Fireangel |
| Colour | White |
| Country of Origin | China |
| Customer Reviews | 4.4 out of 5 stars 11,863 Reviews |
| EU Spare Part Availability Duration | 10 Years |
| Included Components | 1 x Baseplate, 1 x Instruction Manual, 1 x Optical Smoke Alarm complete with Sealed Lithium Battery |
| Item Dimensions D x W x H | 3.2D x 11.8W x 11.8H centimetres |
| Item Type Name | Smoke Alarm |
| Item Weight | 138 Grams |
| Item weight | 138 Grams |
| Manufacturer | FireAngel |
| Manufacturer Warranty Description | 5 year manufacturer's warranty. |
| Material | Plastic |
| Model Number | FA6620-R |
| Operating Humidity | up to 90% |
| Power source | Battery Powered |
| Product Style | New Gen Single |
| Product dimensions | 3.2D x 11.8W x 11.8H centimetres |
| Sensor Type | Photoelectric |
| Style | New Gen Single |
| UPC | 816317006242 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 38 Degrees Celsius |

## Product Details

- **Alarm:** Smoke Alarm
- **Brand:** Fireangel
- **Colour:** White
- **Item weight:** 138 Grams
- **Operating humidity:** up to 90%
- **Power source:** Battery Powered
- **Product dimensions:** 3.2D x 11.8W x 11.8H centimetres
- **Sensor type:** Photoelectric
- **Style:** New Gen Single
- **Upper temperature rating:** 38 Degrees Celsius

## Images

![FireAngel Optical Smoke Alarm - 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 - Image 1](https://m.media-amazon.com/images/I/51WydtnJICL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: so this is not scotland compliant only compliant for england and wales? do not buy for scotland as you cannot use it**
A: As the new Scottish legislation requires residents to have interlinked units, this one will not be compliant as it is standalone. Any unit from our FireAngel Pro range will be compliant though. 
Many Thanks
Gemma

**Q: Hello, Can this be affixed to the ceiling using magnets or heavy duty velcro strips?**
A: Yes I think you could use magnets or Velcro strips but i used small Rawl plugs into plaster board. Simples.

**Q: Can this be used to replace the discontinued model Deta 1151?**
A: We used it to replace an expired and discontinued fire angel model in a caravan ,as we didn’t want more holes drilled in the ceiling. I am sorry I don’t know if it was originally a Deta 1151 but all we had to do was use the original base and screw the new top on. Hope it helps.

**Q: I’ve been told I need to fit a heat alarm that will link with fire alarm; is this possible with this product?**
A: No

## Customer Reviews

### ⭐⭐⭐⭐⭐ Longevity of 1st pair of around 15 years
*by A***R on 6 December 2025*

Arrived well packed & tested & fitted. This is 5th one, 1st 2 lasted around 15 years with the sealed Lithium batteries, really good. This is to replace 1 of replacements as it malfunctioned, but will be replaced/ refunded as 5 year warranty which is great, peace of mind

### ⭐⭐⭐⭐⭐ Excellent smoke alarms - FireAngel quality you can trust
*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.

### ⭐⭐⭐⭐ Decent
*by D***L on 28 January 2026*

Good smoke alarm, easy to fit. It’s not very loud compared to other smoke alarms I’ve had but it’s audible enough if you’re within range.

## Frequently Bought Together

- FireAngel Optical Smoke Alarm - 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
- FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home with AA Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor with Test Button
- 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 Japan*
*Store origin: JP*
*Last updated: 2026-03-09*