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FireAngel 10 Year Life Thermally Enhanced Optical Smoke Alarm


About this product


  • 10 Year life meaning you will never have to change the battery
  • Highly rated by UK’s Fire and Rescue Services
  • Built in test button to give you peace of mind

Product overview

• 10 Year life meaning you will never have to change the battery
• Highly rated by UK’s Fire and Rescue Services
• Built in test button to give you peace of mind
• Thermoptek™ technology giving a quicker reaction to fires than other optical smoke alarms
• Very loud 85 dB siren

How is this different to other alarms?
The FireAngel 10 Year Life Thermally Enhanced Optical Smoke Alarm has the Thermoptek™ technology which combines the very latest in optical sensing with thermal enhancement to provide a fast reaction to both slow smoulder and fast flaming fires in a single alarm. This differs from a standard ionisation smoke alarm, which are less sensitive to slow burning fires which give off larger quantities of smoke before flaming occurs.

How often will I have to change the battery?
The non-removable lithium power pack gives you a 10 year life span, as well as being laser-welded to prevent moisture ingress, to ensure the alarm remains powered for the duration of the power pack. This means you won’t have to change the battery every year as with standard smoke alarms as well as giving you the peace of mind of knowing your alarm is always powered.

Rated 1 out of 5 by from Fitted by landlord but.. These were fitted by our landlord (big social housing group) to our rooms some time ago. On second one now after 1st started low battery beep. This new one started low battery beep and its not even been 2 years.
Date published: 2014-10-13
Rated 3 out of 5 by from Irritating false warnings Fitted a SO-601 smoke alarm May 2011. 4 years later and it will suddenly start making a very loud noise without any cause whatsoever (this has happened several times in the last 4 months). No low battery warning. Reset button does not stop the noise, only removal from the ceiling fitting.
Date published: 2015-10-29
Rated 5 out of 5 by from Bought this as a replacement for a faulty unit. The old one had given years of good trouble free service but had recently started to 'beep' for no apparent reason. Bought this replacement as hope for another good few years maintenance free.
Date published: 2013-07-30
Rated 2 out of 5 by from Does not last 10 years I bought 10 of these 3 years ago. Fitted them all over the house outside kitchen & bathroom. After 3 years, 3 of them have gone "low battery beep". I don't expect the others to last 10 years. So could have gone cheaper.
Date published: 2015-05-04
Rated 4 out of 5 by from Easy to install I like this smoke alarm because it doesn't go off when I make toast or when there's steam. It's easy to install. I bought this to replace an identical one. Don't expect the battery to last as long as they say. If you get 5 yrs out of it you'll be lucky, but for the price, it's O.K
Date published: 2016-08-18
Rated 4 out of 5 by from Good value Bought this last week, easy to install and excellent value for money with a ten year guarantee. Hope we don't have to use it too often!!
Date published: 2016-10-23
Rated 4 out of 5 by from Appears in search as a carbon monoxide alarm - it isn’t! Very easy to put up, very easy to test it only is able to be tested when it isn’t flat against the surface not out of the packet it’s fine. But it isn’t for carbon monoxide so I shall keep one and return the other!
Date published: 2018-01-02
Rated 5 out of 5 by from smart great product, simple to use and with no battery to fuss about
Date published: 2017-10-31
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Power Source
Mains No
Battery Yes
Mains and Battery Back-up No
Low Battery Indicator Yes
Built-in Battery Yes
Heat No
Smoke Yes
Carbon Monoxide No
BS BS EN 14604:2005
Other KM 557789
Wireless No
Wired No
Links with Other Alarms No
Links with Other Security Systems No
Control and Notifications
Manual N/A
Automatic N/A
Remote Controlled (Via Keyfob Remote or App) N/A
Push Notification Alerts N/A
Strobe Light No
Siren Yes
Siren Loudness 85 dB
Siren Duration Until reset
Operating Range
Maximum Operating Range N/A
Transmission Frequency N/A
Operating Systems and Protocols
Android N/A
Expandable No
Operating Power DC 3 V
Dimension 130 mm x 130 mm x 34 mm
Weight 162 g
Battery Type:
For Control Unit Non-removable lithium
For Sensors and Accessories N/A
Test Mode Button Yes
Installation Position Ceiling/Wall
Package Contents
FireAngel 10 Year Life Thermally Enhanced Optical Smoke Alarm

What's the difference between Fire Angel 620, 620R and 620Q please?

Asked by: Alan
The details about all the products can be found below.
Answered by: Dominic
Date published: 2017-10-04

Does it not go off if you burn toast and how do you silence it if it does sound ?

Asked by: Nick
Unfortunately we are unable to guarantee if it would go off if you burned toast. The item would silence its self once it cannot detect any more smoke
Answered by: Dale
Date published: 2017-09-29

how to install fireangel 10 yr smoke detector

Asked by: martin
I would advise to follow fitting instructions provided with the item.
Answered by: Dominic
Date published: 2016-11-24

Can you connect one detector to another 

Asked by: Harry
I am sorry but the item in question does not support use in your intended application.
Answered by: Les
Date published: 2016-10-25

I have Fire Angel Smoke Alarm ST-822. After 1 year it bleeps every 40 seconds.Why is this,is the battery flat?

Asked by: pete
This does sound like the battery warning and may need replacing.
Answered by: Darren
Date published: 2016-08-24

Can this item be fixed with adhesive pad if so do you sell the pads

Asked by: Taidie
No this is not advised.
Answered by: Dominic
Date published: 2016-08-09

what is the fire angel model number of this alarm pls?

Asked by: jacktar
The part number is ST620X5
Answered by: Dominic
Date published: 2017-01-27

how do you fit it?

Asked by: Doug
Please follow fitting guide provided in the manual
Answered by: Dominic
Date published: 2015-07-17
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