The BRK 770MRL (also known as ) mains powered ionisation smoke alarm provides quick detection of fast flaming fires and is typically installed in upstairs landing areas. Fitted with a sealed re-chargeable 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.
- 230V mains powered smoke alarm
- Sealed lithium back-up battery - does not need replacing for the life of the alarm
- CE marked and Kitemarked to BS EN 14604
- 5 year manufacturer's warranty
- Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
- 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
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 .
The table below shows all the units that can interlink with the BRK mains powered smoke and heat alarms.
Alarms from the Same Series
||Type of unit
||Type of interlink
||Ionisation Smoke Alarm
||Hard wire interlink
||Optical Smoke Alarm
||Hard wire interlink
||Hard wire interlink
This is the technical data for the Mains Powered Ionisation Smoke Alarm with Lithium Back-up Battery - BRK 770MRL.
|Alternative Product Codes
||BK770, 770, 770MRL, BK770MRL
||85dB at 3m
||Sealed long life lithium
||+5 °C to +38 °C
||10% to 85%
The following datasheets are available for this product.
Q. Can air purifiers affect ionisation smoke alarms?
A. Yes, air purifiers may cause ionisation smoke alarms to sound falsely.
Q. What smoke alarm should I use in a bedroom with an en suite bathroom?
A. It is usually recommended to install an optical smoke alarm in a bedroom. This is because optical smoke alarms are slightly quicker at detecting slow smouldering fires that can originate from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than an ionisation would, if steam/water droplets were present from the bathroom. Detectors should be installed as central to the room as possible; however for your application I would also consider the position of the en suite to make sure that the detector is not in the direct path of the joining door. This is just to try and avoid the chances of a false alarm. No detector is designed for use in bathroom areas.
Q. How do I safely dispose of my old smoke alarms?
A. Safelincs is signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme (Registration ID: 7370). Private households can therefore drop off their electronic and electrical fire safety waste at their municipal recycling centre when they are purchasing new products from us. To find your nearest recycling centre, please visit www.recycle-more.co.uk.
Q. Can the mains powered smoke alarm range be connected to mains power via the lighting circuit?
A. Yes, hard-wired mains powered alarms can be wired to the unswitched live feed of the nearest frequently used lighting circuit.
Q. How long do the batteries last in smoke alarms?
A. The 9V alkaline batteries last 12~18 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.
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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.
4 customers have rated this product and it has an overall rating of 5 out of 5
All our reviews are written by real customers that have purchased this product from us and are published without modification.
Reviewed by: KS
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
Reviewed by: MC
Exellant replacement for my old smoke alarms which were the type that needed the battery replacing every few years.
Published on: 5th November 2018
Reviewed by: AT
Does what it says on the box!
Published on: 14th October 2018
Reviewed by: MJ
Fits in place of an older model. does the job I need it to do.
Published on: 27th April 2016