---
product_id: 470810555
title: "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: "₩102815"
currency: KRW
in_stock: true
reviews_count: 13
category: "Fireangel"
url: https://www.desertcart.kr/products/470810555-carbon-monoxide-detector-10-year-life-sealed-battery-fa3820-carbon
store_origin: KR
region: South Korea
---

# Compact 125x67x33 mm size 85 dB loud multi-tone alarm 10-year sealed battery life 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:** ₩102815
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of danger with FireAngel’s 10-year CO guardian! 🚨

## Quick Answers

- **What is this?** 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?** ₩102815 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/470810555-carbon-monoxide-detector-10-year-life-sealed-battery-fa3820-carbon)

## 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

- • **Certified & Trusted:** BSI Kitemark certified and UKCA marked for guaranteed reliability and safety compliance.
- • **Clear & Loud Alerts:** 85 dB alarm with flashing red LED ensures you never miss a critical warning.
- • **Travel-Ready Safety:** Compact, portable design fits seamlessly in homes or on the go for continuous protection.
- • **Proactive CO Detection:** High sensitivity mode triggers early alerts before CO hits dangerous levels.
- • **Decade-Long Peace of Mind:** Sealed, tamper-proof lithium battery lasts 10 years—no replacements, no hassle.

## Overview

The FireAngel FA3820 Carbon Monoxide Detector features an advanced electrochemical sensor with a high sensitivity pre-alarm, a powerful 85 dB audible alert, and a sealed 10-year lithium battery ensuring maintenance-free operation. Compact and portable, it’s certified by BSI and UKCA, making it a trusted choice for home and travel safety.

## Description

From the brand Shop Smoke Alarms Visit the store Shop Smoke Alarms Visit the store Shop Carbon Monoxide Alarms Visit the store Shop Carbon Monoxide Alarms Shop Heat Alarms Visit the store Shop Heat Alarms Shop Pro Connected Alarms Visit the store Shop Pro Connected Alarms

Review: Co alarm. - Always buy fireangel they work perfectly and are easy to install.
Review: Good value - Works well, small and easily ckept out of sight. My last one lasted longer than the time stated so good value for money.

## 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 CE and 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 |
| Batteries | 1 CR123A batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Lithium |
| Best Sellers Rank | 20 in DIY & Tools ( See Top 100 in DIY & Tools ) 2 in Carbon Monoxide Detectors |
| Colour | Clear |
| Customer Reviews | 4.7 4.7 out of 5 stars (11,151) |
| Date First Available | 12 Aug. 2022 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Included Components | 1 x Carbon Monoxide Detector (with sealed battery), 1 x Manual |
| Item Package Quantity | 1 |
| Item Weight | 95 g |
| Item model number | FA3820 |
| Manufacturer | FireAngel |
| Material | Plastic |
| Measurement System | 1 St. |
| Part Number | FA3820 |
| Power Source | Battery Powered |
| Product Dimensions | 3.3 x 12.5 x 6.7 cm; 95 g |
| Shape | Oval |
| Size | Single Unit with 10-Year Life Sealed Battery |
| Special Features | Sensor type: electrochemical response thresholds according to |
| Style | Single |

## 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

![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)

## Available Options

This product comes in different **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

### ⭐⭐⭐⭐⭐ Co alarm.
*by B***L on 14 January 2026*

Always buy fireangel they work perfectly and are easy to install.

### ⭐⭐⭐⭐⭐ Good value
*by M***N on 3 January 2026*

Works well, small and easily ckept out of sight. My last one lasted longer than the time stated so good value for money.

### ⭐⭐⭐⭐ Well worth the expense
*by S***M on 24 October 2025*

The alarms are very good and the instructions well explained and easy to set up. The design and alarm sound are adequate and value for money and it’s peace of mind.

## Frequently Bought Together

- 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
- 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
- FireAngel Heat Alarm with 10 Year Sealed For Life Battery, FA6720-R (HT-630 replacement, new gen), White

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**Shop now:** [https://www.desertcart.kr/products/470810555-carbon-monoxide-detector-10-year-life-sealed-battery-fa3820-carbon](https://www.desertcart.kr/products/470810555-carbon-monoxide-detector-10-year-life-sealed-battery-fa3820-carbon)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-02*