---
product_id: 470810555
title: "FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White"
brand: "fireangel"
price: "R968"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Fireangel"
url: https://www.desertcart.co.za/products/470810555-fireangel-carbon-monoxide-detector-10-year-life-sealed-battery-fa3820
store_origin: ZA
region: South Africa
---

# Compact 125x67x33 mm portable design 85 dB(A) loud multi-alert system 10-year sealed battery life FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White

**Brand:** fireangel
**Price:** R968
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of the silent threat with FireAngel’s 10-year CO guardian!

## Quick Answers

- **What is this?** FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White by fireangel
- **How much does it cost?** R968 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/470810555-fireangel-carbon-monoxide-detector-10-year-life-sealed-battery-fa3820)

## 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

- • **Dual Alert System:** Loud 85 dB chirps plus flashing red LED ensure you never miss a danger signal.
- • **Certified & Trusted:** BSI Kitemark certified and UKCA marked for guaranteed top-tier safety compliance.
- • **Smart Early Warning:** High sensitivity mode triggers pre-alarm at 180 ppm CO for faster, proactive alerts.
- • **Travel-Ready Safety:** Compact, free-standing design fits perfectly in homes, rentals, caravans, and hotels.
- • **Decade-Long Peace of Mind:** Tamper-proof sealed battery lasts 10 years—no replacements, no hassle.

## Overview

The FireAngel FA3820 Carbon Monoxide Detector combines advanced electrochemical sensing with a tamper-proof 10-year sealed battery, delivering reliable, maintenance-free protection. Its compact, travel-friendly design and dual alert system (audible 85 dB alarm plus flashing LED) ensure rapid detection of dangerous CO levels at home or on the go. Certified by BSI and UKCA, this device offers professional-grade safety for modern living spaces and mobile lifestyles.

## Description

From the manufacturer Breathe Easy At FireAngel, we're dedicated to protecting and improving our customers’ lives by making innovative, cutting-edge fire safety technology that’s simple and accessible. The FA3820’s electrochemical sensing technology enables a fast reaction to rising levels of carbon monoxide (CO), aka ‘The Silent Killer’, helping to keep you and your family safe. HOME SAFETY: CO has no colour, smell or taste; it is completely invisible and undetectable to human senses. making it especially dangerous as it can build up in enclosed spaces without any warning signs. A CO detector is the only way to ensure your safety. SEALED-FOR-LIFE BATTERY: The FA3820 CO alarm has a 10-year, tamper-proof battery that will last the lifetime of the alarm. A flashing amber '!' and an audible beep will alert you when the device needs replacing. SLEEP EASY FUNCTION: If the low battery warning sounds at night, activate the Sleep Easy function by pressing the test button to mute the alarm for 8 hours whilst the amber light flashes. Replace the device ASAP. UK SAFETY STANDARDS: The FA3820 CO detector is CE and UKCA marked, Kitemark certified, and has been rigorously tested and approved by the British Standards Institute (BSI) to BS EN 50291-1:2018 and BS EN 50291-2:2019. Suitable for all domestic and rental premises. The FA3820 offers the highest level of CO detection for your home and replaces end-of-life CO-9X alarms. FireAngel: Smarter solutions for safer homes. Visual and Audible Warnings The FireAngel digital CO alarm is designed with an effective dual alert system. In the event of a CO leak, four loud chirps – 85 dB(A) at 3 m (min) – will sound, providing an audible alarm. An insistent flashing red ‘CO’ LED light will give you a visual alert. Enhanced CO Sensing Intelligent CO sensing technology enables the FA3820’s high sensitivity mode to activate if it predicts CO levels will increase to or above 180 ppm, providing a quicker alert. The Early Warning pre-alarm pattern consists of 1 short chirp, followed by 1 long chirp, and an amber warning flash every 25 seconds. A yellow ‘ventilate’ visual instruction will alert you to open the windows and prevent CO buildup. Portable Design Measuring 125 x 67 x 33 mm, this free-standing device is travel-friendly, providing peace of mind and CO protection wherever you go. Compact design suitable for travel. Suitable for domestic premises, including static and mobile homes, caravans, motor caravans and boats. What should I do if the carbon monoxide (CO) alarm sounds? In the event of the CO alarm sounding, follow these 3 steps VENTILATE : Keep calm; open doors and windows to ventilate your home. Stop using fuel-burning appliances and turn them off. EVACUATE : Evacuate the property immediately. RING FOR HELP: If in the UK, call The National Gas Emergency Service on 0800 111 999. If outside the UK, call your supplier's emergency number. Do not use appliances until they have been checked by an expert. Get medical help for anyone suffering the effects of CO poisoning. What are the symptoms of CO poisoning? Symptoms of CO poisoning include headache, dizziness, weakness, nausea and vomiting, rapid heartbeat, shortness of breath, seizures, chest pain, disorientation, and loss of consciousness. Who should I call in the event of a CO leak? If in the UK, call The National Gas Emergency Service on 0800 111 999. If outside the UK, call your supplier's emergency number. What are the sources of CO? The common sources of Carbon Monoxide (CO) are cookers, fires, boilers, oil and gas boilers, portable generators, oil or solid fuel cookers, gas or paraffin heaters, barbecues (BBQs), clogged chimneys, wood or gas fireplaces, cigarette smoke or any fossil fuel‑burning appliances. 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 carbon monoxide detectors 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, smoke, and heat alarms.

Review: Excellent replacement carbon monoxide detectors - The carbon monoxide detectors are easy to set up arrived quickly and at a reasonable price with a 10 year warranty
Review: Good, reliable brand - This replaced a detector requiring battery replacement which we did annually during the course of the units life-span. The 10-year sealed battery in this replacement unit provides increased peace of mind - though it remains important to regularly test. FireAngel seems to be a good and reliable brand which we have bought for many years.

## Features

- CARBON MONOXIDE ALARMS FOR HOME USE: The advanced electrochemical sensor detects dangerous levels of carbon monoxide (CO) in your home, alerting you with 4 loud chirps (85 dB(A) at 3 metres) and a flashing red ‘CO’ LED light.
- ENHANCED SENSING: The alarm’s high sensitivity mode will activate if it predicts that CO levels will rise to or above 180 ppm, providing a quicker alert and a ‘pre alarm’ with a visual instruction to ‘ventilate'.
- 10-YEAR SEALED FOR LIFE BATTERY: Each CO monitor is fitted with a sealed, tamper proof, 10 year battery that will last the lifetime of the alarm. A flashing amber '!' and an audible beep will alert you when the device needs replacing.
- ALARM MEMORY: Your device will notify you of a CO alarm in your absence. If not silenced, the alarm will continue to sound until CO levels are safe. The red ‘CO’ light will continue flashing as a visual indication of a previous activation.
- PORTABLE CARBON MONOXIDE DETECTOR: Measuring 125 x 67 x 33 mm, this compact, free standing device is travel friendly and provides protection wherever you go. It also includes an integrated mounting bracket and screws for easy wall mounting.
- SAFETY ASSURED: Suitable for all domestic and rental premises, the FA3820 carbon monoxide monitor is UKCA marked, Kitemark certified, and third-party approved by the British Standards Institute (BSI) to BS EN 50291-1:2018 and EN 50291-2:2019.
- FIREANGEL HOME PROTECTION: In addition to our carbon monoxide detectors, 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, smoke, and heat alarms.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B9HC17ZG |
| Alarm | Audible |
| Best Sellers Rank | 553 in DIY & Tools ( See Top 100 in DIY & Tools ) 8 in Carbon Monoxide Detectors |
| Brand | Fireangel |
| Colour | White |
| Country of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 3,095 Reviews |
| Included Components | 1 x Carbon Monoxide Detector (with sealed battery), 1 x Manual |
| Item Dimensions D x W x H | 3.3D x 12.5W x 6.7H centimetres |
| Item Type Name | Carbon Monoxide Alarm |
| Item Weight | 95 Grams |
| Item weight | 95 Grams |
| Manufacturer | FireAngel |
| Manufacturer Contact Information | FireAngel Safety Technology Limited, Vanguard Centre Coventry, CV4 7EZ, UK. |
| Manufacturer Warranty Description | 5 year manufacturers warranty. |
| Material | Plastic |
| Model Number | FA3820 |
| Power source | Battery Powered |
| Product Style | Single |
| Product dimensions | 3.3D x 12.5W x 6.7H centimetres |
| Sensor Type | Electrochemical |
| Style | Single |
| UPC | 816317006020 |
| Unit Count | 1.0 count |

## Product Details

- **Alarm:** Audible
- **Brand:** Fireangel
- **Colour:** Clear
- **Item weight:** 95 Grams
- **Material:** Plastic
- **Number of items:** 1
- **Power source:** Battery Powered
- **Product dimensions:** 3.3D x 12.5W x 6.7H centimetres
- **Sensor type:** Electrochemical
- **Style:** Single

## Images

![FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White - Image 1](https://m.media-amazon.com/images/I/51gt0uac51L.jpg)
![FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White - Image 2](https://m.media-amazon.com/images/I/61+F9OGmbsL.jpg)
![FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White - Image 3](https://m.media-amazon.com/images/I/61pJmOw3xuL.jpg)
![FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White - Image 4](https://m.media-amazon.com/images/I/71e-tVNx4DL.jpg)
![FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White - Image 5](https://m.media-amazon.com/images/I/61PrpNhjPpL.jpg)

## Available Options

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

## Questions & Answers

**Q: Silence mode how to set up? Pressing test button gives me alarm. What's the point then?**
A: I don't think there is a set up procedure for silent mode. I think that after testing, when the alarm stops, the unit goes into silent mode for 5 minutes to reset itself and then starts monitoring again.

**Q: To Seller:
What is the battery (lithium) expiry date printed on the box?
Thank you.**
A: I bought one of these about a month ago. I don't have the box anymore, but the printing on the unit says replace by 09/2034.

**Q: Can this be used outdoors for my patio heater ?**
A: I wouldn't think so as if it's outdoors, any carbon monoxide would just disperse harmlessly in the air. It's only dangerous indoors.

**Q: Contact seller I bought two they arrived today one is very quiet the other perfect  us this a fault? The other is perfect please devise**
A: When I activated the test procedure the alarm volume increased and was fairly loud.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent replacement carbon monoxide detectors
*by K***N on 24 December 2025*

The carbon monoxide detectors are easy to set up arrived quickly and at a reasonable price with a 10 year warranty

### ⭐⭐⭐⭐⭐ Good, reliable brand
*by S***K on 25 February 2026*

This replaced a detector requiring battery replacement which we did annually during the course of the units life-span. The 10-year sealed battery in this replacement unit provides increased peace of mind - though it remains important to regularly test. FireAngel seems to be a good and reliable brand which we have bought for many years.

### ⭐⭐⭐⭐ Easy to install
*by L***A on 16 September 2025*

Purchased for the caravan. There are cheaper ones out there but I went for this as it meant I could use the fitment base from my old one as its the same make and didn't have to make more holes in the caravan. It also has a 10 year sealed battery life so I don't have to remember to keep extra batteries in the caravan or get the annoying "beep" when the batteries need changing every few months! Easy to fit and just fitted straight onto original base. Arrived quickly and packaged well.

## Frequently Bought Together

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-12*