---
product_id: 71820788
title: "BRK CO850MBXi Carbon Monoxide Detector, Mains Powered with 9 V Battery Backup"
brand: "brk"
price: "NT$212"
currency: TWD
in_stock: false
reviews_count: 8
url: https://www.desertcart.tw/products/71820788-brk-co850mbxi-carbon-monoxide-detector-mains-powered-with-9-v
store_origin: TW
region: Taiwan
---

# 85 dB alarm 9 V battery backup Interlink up to 12 alarms BRK CO850MBXi Carbon Monoxide Detector, Mains Powered with 9 V Battery Backup

**Brand:** brk
**Price:** NT$212
**Availability:** ❌ Out of Stock

## Summary

> 🔒 Breathe Easy, Live Safely! Your home deserves the best in safety technology.

## Quick Answers

- **What is this?** BRK CO850MBXi Carbon Monoxide Detector, Mains Powered with 9 V Battery Backup by brk
- **How much does it cost?** NT$212 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/71820788-brk-co850mbxi-carbon-monoxide-detector-mains-powered-with-9-v)

## Best For

- brk enthusiasts

## Why This Product

- Trusted brk brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Connectivity:** Interlink with up to 12 alarms for comprehensive home safety.
- • **Instant Test & Reset:** Quickly silence false alarms with a simple button press.
- • **Guaranteed Protection:** Enjoy a 5-year guarantee for reliable safety.
- • **Stay Alert, Stay Safe!:** Experience peace of mind with real-time carbon monoxide detection.
- • **Loud & Clear Notifications:** An 85 dB alarm ensures you won't miss a warning.

## Overview

The BRK CO850MBXi Carbon Monoxide Detector is a mains-powered alarm equipped with a 9 V battery backup, ensuring continuous protection against carbon monoxide. Featuring an electrochemical sensor, it delivers accurate detection and alerts you with a loud 85 dB alarm. The device supports interlinking with up to 12 alarms, providing a comprehensive safety network. With an instant test/reset button and a 5-year guarantee, this detector is designed for reliability and peace of mind.

## Description

Full description not available

## Features

- Carbon monoxide alarm alerts you to elevated carbon monoxide levels in the home
- Electrochemical sensor accurately detects carbon monoxide and alerts you with a loud 85 dB alarm
- Instant test/reset button quickly silences false alarms; features power, alarm and fault LCD indicators
- Multi-alarm interlink system allows you to connect up to 12 mains smoke, CO and heat alarms for simultaneous warning
- 230 V primary mains power CO alarm with included 9 V battery backup; backed by 5-year guarantee; measures 134 mm (H) x 69 mm (W) x 60 mm (D)
- 5-year guarantee BS EN 50291-1: 2010
- Note: The battery connectors are taped over inside to avoid contact.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | BRK |
| Part Number | CO850MBXI |
| Product Dimensions | 8 x 13.5 x 7.4 cm; 300 g |
| Item model number | CO850MBXI |
| Colour | White |
| Power Source | Battery Powered |
| Item Package Quantity | 1 |
| Batteries Required? | No |
| Item Weight | 300 g |

## Images

![BRK CO850MBXi Carbon Monoxide Detector, Mains Powered with 9 V Battery Backup - Image 1](https://m.media-amazon.com/images/I/61jBv6UiSGL.jpg)
![BRK CO850MBXi Carbon Monoxide Detector, Mains Powered with 9 V Battery Backup - Image 2](https://m.media-amazon.com/images/I/81cFbIrleJL.jpg)
![BRK CO850MBXi Carbon Monoxide Detector, Mains Powered with 9 V Battery Backup - Image 3](https://m.media-amazon.com/images/I/61LMvtkXquL.jpg)
![BRK CO850MBXi Carbon Monoxide Detector, Mains Powered with 9 V Battery Backup - Image 4](https://m.media-amazon.com/images/I/61xE+bLL+hL.jpg)
![BRK CO850MBXi Carbon Monoxide Detector, Mains Powered with 9 V Battery Backup - Image 5](https://m.media-amazon.com/images/I/61ul6PVg8oL.jpg)

## Questions & Answers

**Q: Is this the same product as deta 1121 and can i plug directly into the existing deta mount**
A: I have as it was identical

**Q: Can this be mounted on a ceiling? Can it interconnet with BRK mains smoke alarm?**
A: I brought the unit to replace the one which was in the flat as it had expired. Ours is mounted on the ceiling in the kitchen to answer your first question. I wouldn't know the interconnet  with BRK mains smoke alarm, but i believe our is linked with the smoke alarm in our hallway.  Link for the manual below. http://brk.co.uk/wp-content/uploads/2011/11/Manual_CO850-series_UK2.pdf

**Q: I need to change the battery.  Does anyone know what kind of screwdriver I can use - I'm having trouble finding a suitable head**
A: I used a small screwdriver from a glasses repair kit, as the screw is pretty small. Also be aware the unit has a life span of a few years, so replacing battery might not resolve the issue of it going off by itself. If happening to you.

**Q: Is this the same as a newlec nl 3624**
A: Yes it is.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quick and Easy Swap from Existing Unit
*by M***R on 15 October 2021*

Second time purchasing this Carbon Monoxide Detector after the first one indicated that it was perished after several years. Super easy to install and setup. Can't fault it.Does what it says on the tin!

### ⭐⭐⭐⭐⭐ It works
*by D***S on 15 February 2021*

Bought as a direct replacement for the one that was beeping in the kitchen as it was passed it’s use by date. New one is quiet now thankfully. Works as described

### ⭐⭐⭐⭐⭐ Plug and play
*by A***R on 11 April 2021*

Needed replacement for my detector which was water damaged, was a different manufacturer but this plugged straight in . Many thanks

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.tw/products/71820788-brk-co850mbxi-carbon-monoxide-detector-mains-powered-with-9-v](https://www.desertcart.tw/products/71820788-brk-co850mbxi-carbon-monoxide-detector-mains-powered-with-9-v)

---

*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-22*