BRK 670MBX Ionisation Smoke Alarm, Mains Powered with 9 V Battery Backup

This was to replace exact same one that had lasted 9 years. Reliable. Easy to install & unobtrusive. Shame it has been discontinued.

Bought two of these as both of our original smoke alarms that were fitted to our house from new (12 yrs ago and a different brand!!) had passed their sell by date and were continuously bleeping similar to if the battery was dead in them but even with new batteries the bleeping did not stop which firmly indicated both were dead as a door nail ! These smoke alarms fitted exactly in the same footprint as our old ones and there was no need to re-drill for the mounting rings as there are plenty of fixing holes which matched up to where our original screws were to the old ones. Would highly recommend these as they are so simple to retro fit if you need to replace an old smoke alarm or indeed if also easy to fit in a new installation having not had one before. 5* from us !!!!!

Bought this as a replacement for some Delta alarms after reading other peoples review, and it was extremely easy to swap out. As others have mentioned the bracket was the same so it was a matter of removing the old one and putting in the new ones, after making sure the batteries are in. The validity of the units I got were for 9.5 years, which I think is acceptable given that between production and distribution there will always be sometime lost, but for the price you pay it makes it very good value for money at just over £1 per year of use, and for a peace of mind that is priceless!

Perfect replacement for my 10 year old units x 2. Fitting was extremely easy and straightforward. Excellent value for your safety and well made. Would certainly buy again without hesitation.

There are 5 interconnected BRK 670MBX in my home, spread over 3 floors. These were required under the planning permission granted back in 1993. I have replaced them every 10 years. If the wiring is already in place, it takes just 2 minutes to remove the old one and fit the new one in place. The original model had the battery in a tray that could be easily pulled out to replace the battery. The later ones are definitely more difficult. You have to unscrew the alarm from the base plate, pull out the mains connector and unscrew the battery compartment's lid before the battery could be replaced. Why they had to make it so difficult is beyond me.

Bought as a direct replacement for a failed( before expiry date) unit. Slightly dismayed by failure of original electrician installed unit, but this was an easy to fit replacement, green mains power light is showing and included 9 volt back up battery. Not sure of battery life so minus a star.

Elegant and functional. Total peace of mind with a high quality system, built to exacting standards. These guys have raised the bar on smoke detectors, and their attention to detail is, frankly, staggering. Beautifully finished in a matt white plastic, it is evident that only the best materials have been used to create this astonishingly accurate reproduction of an iconic design.

I bought this smoke alarm a few years back and installed myself. It still works, only one battery change so far.