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Mains Powered Ionisation Smoke Alarm with Self-Charging 10 Year Back-up Battery - BRK 770MRL

Discontinued Product - No Compatible Replacement

Please Note: The manufacturer has withdrawn from the European market and is no longer supplying compatible alternatives. Since it is not possible to interlink alarms from different manufacturers, the recommended replacement for the whole discontinued BRK 700MRL range is the Aico Ei3000 series.

alternative product

Mains Powered Smoke Alarms with Lithium Back-up Ei3000 Series

  • Available in Optical, Heat, Combined Optical & Heat, and Combined Heat & CO
  • Mains powered alarms with sealed lithium back-up battery
  • AudioLINK technology fitted as standard
  • Interlinks with up to 12 compatible devices
  • Compatible with Ei3000MRF SmartLINK Module for radio-interlinking
  • Suitable for BS 5839-6: 2019 Grade D1 installations
  • Also suitable for the 2022 Scottish legislation

£45.59 inc VAT

£37.99 ex VAT

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Product Overview

The BRK 770MRL (also known as 670MRL) mains powered ionisation smoke alarm provides quick detection of fast flaming fires and is typically installed in upstairs landing areas. Fitted with a sealed self-charging lithium back-up battery, the 770MRL does not require a battery change for the life of the alarm, making it ideal for properties where replacing batteries would be inconvenient. Up to 12 alarms from the BRK 700MRL series can be interlinked by wire within a single system.

  • Power: 230V mains powered with back-up battery
  • Backup Battery: Re-chargeable lithium battery lasts the lifetime of your alarm - GUARANTEED
  • Warranty: 5 year manufacturer's warranty
  • Please note that BRK and First Alert are no longer manufacturing new stock for the European Market and while the products may have a 2018/19 manufacturing date they still provide a full 10 year lifespan and full warranty cover from date of purchase
  • CE marked and Kitemarked to BS EN 14604
  • Suitable for installations complying to BS 5839-6: 2019 Grade D1
  • Quick to respond to fast flaming fires
  • Suitable for installing in upstairs landing areas
  • Up to 12 alarms from the 700MRL series can be hard wire interlinked
  • An interlinked system provides the earliest possible warning of fire
  • Test and hush button facility
  • Easy to install push-fit base plate
  • Product warranty and life commences from date of purchase
  • This alarm is also suitable for the updated 2022 Scottish legislation for fire alarms in homes

Please note: this product is not a direct upgrade from the 670MBX smoke alarm. Upgrading from a BRK 600MBX series alarm featuring an alkaline battery and twist-on base may require rewiring by a qualified electrician.

Interlink

The table below shows all the units that can interlink with the BRK mains powered smoke and heat alarms.

Alarms from the Same Series

Model Number Type of unit Type of interlink
770MRL Ionisation Smoke Alarm Hard wire interlink
760MRL Optical Smoke Alarm Hard wire interlink
790MRL Heat Alarm Hard wire interlink
Technical Data
Product Code BK770MRL
Alternative Product Codes BK770, 770, 770MRL, BK770MRL
Brand BRK
Back-Up Battery

Self-charging Lithium Battery

Dimensions (HxDia)

53x140mm

Operating Temperature

+5°C to +38°C

Relative Humidity

10% to 85%

Sound Output

85dB

Warranty

5 Years

Weight 0.28kg
Product Datasheets
FAQs (5)
Q. Do you need an electrician to connect mains powered smoke alarms?
A.

It is necessary that an electrician installs mains powered smoke alarms.

Q. When the test button is pressed on an interlinking smoke alarm will this cause all the other units to go off, too?
A.

Yes, by pressing the test button on one alarm all the units in that family will also be activated. To 'teach' the units which other smoke alarms belong to the same family, the smoke alarms have to be set up together during the installation. This is done by pressing a 'housecoding button' or similar process.

Q. If a false alarm goes off can pressing the hush button on any of the interlinking alarms stop all the units beeping?
A.

No, to stop the alarms from sounding the hush button on the unit that started the process needs to be pushed. Pressing any other unit will just silence that one unit. The unit can be identified by the rapidly flashing red LED.

Q. How long do the batteries last in smoke alarms?
A.

The 9V alkaline batteries and AA alkaline batteries generally last 12 to 18 months. Lithium batteries will usually last 5x longer than their alkaline counterparts, achieving around 5 years lifetime. Some lithium cells are also rechargeable, and when used in a mains-powered alarm may last for the entire functional lifespan of the alarm. Newer alarm models may also feature a "sealed" lithium battery. These batteries are specialist components which are designed to not be removed or need replacing by the user, and have been tested by the alarm manufacturer to ensure they last for the lifetime of the alarm.


Please note: the actual lifetime of your batteries depends on how often the alarms are tested or activated, as sounding the alarm draws more power than when the alarms are "waiting" to detect fire. You should also read your alarm's manual to make sure you only use the recommended types and brands of batteries, as failing to follow these instructions may cause the alarm to malfunction, not alerting you in the event of a fire, and might also invalidate the warranty.

Q. What sort of smoke alarm system would I need to install for a HMO?
A.

BS 5839-6 recommends that one or two storey HMOs with an individual floor area of no more than 200sqm (not the total of both floors) should have a Grade D smoke alarm system installed. Grade D refers to mains powered smoke alarms with a back up battery power supply. The alarms can be interlinked either by wire or by radio signal and the system does not require a separate fire alarm panel. For HMOs of 3 storey or higher, a Grade A panel system would need to be installed. This can cover the whole of the building, or can be used just for the communal areas with a separate Grade D system installed for the individual dwellings. For both applications, the level of cover should be a minimum of LD3 (in all escape routes) but this may change according to the fire risk assessment.

Customer Reviews

4 customers have given this product an overall rating of 5 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by: K S

Great product and simple to install onto an existing plate if you are replacing an old product such as DICON Watch out for the battery tag, there is a clear one which implies you pull it out and it is then connected. In actual fact you need to take the battery out and connect it. Not sure what the first tag is for.

Published on: 18th March 2019

Rating: 5 / 5 Stars

Reviewed by:

Exellant replacement for my old smoke alarms which were the type that needed the battery replacing every few years.

Published on: 5th November 2018

Rating: 5 / 5 Stars

Reviewed by:

Does what it says on the box!

Published on: 14th October 2018

Rating: 5 / 5 Stars

Reviewed by:

Fits in place of an older model. does the job I need it to do.

Published on: 27th April 2016

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