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10 Year Longlife Battery Optical Smoke Alarm - FireAngel FA6620-R

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£20.99 inc VAT
£17.49 ex VAT
Product Overview

Powered by a 10 year sealed lithium battery, the FireAngel FA6620-R is suitable for installations throughout your home as well as leisure accommodation vehicles such as motorhomes or tourers. Designed to detect slow, smouldering fires you can be assured that you will get the earliest warning possible to a fire. Features a Sleep Easy function which can silence low battery warnings for up to 8 hours. Ideal solution to replace your old ST-622 with no need to change the base plate or redecorate.

  • Optical sensor suitable for slow burning fires
  • Ideal for installation in bedrooms, living areas, hallways and landings
  • Suitable for leisure accommodation vehicles such as motorhomes and tourers
  • Battery: 10 year sealed lithium battery
  • Warranty: 5 year warranty
  • CE marked to BS EN 14604: 2005
  • UKCA marked
  • Suitable for installations complying to BS 5839-6: 2019 Grade F1
  • Large, central test / hush button for easy weekly testing:
    • Single press - self-test at a reduced volume (at least 10dB below full volume)
    • Double press - self-test at full alarm volume (85dB at 3 metres)
  • Low battery warning to indicate when the alarm is due to be replaced
  • Sleep Easy™ function silences the low battery chirp for up to 8 hours
  • Easy installation with fixings provided
  • Replace your old ST-622 with no need to change the base plate or redecorate
Technical Data
Product Code FAFA6620-R
Alternative Product Codes FA6620-R
Brand FireAngel
Battery Type

10 Year Sealed Lithium

Dimensions (HxDia)

31.5 x 118.1mm

Operating Humidity

Up to 90% RH (non condensing)

Operating Temperature

+4°C to +38°C

Sensor Type


Sound Output

Full Alarm Test: 85dB at 3 metres

Reduced Volume Test: At least 10dB below full volume

Storage Humidity

Up to 93% RH (non condensing)

Storage Temperature

-20°C to +60°C


5 Years

Weight 0.14kg
Product Datasheets
FAQs (4)
Q. Why is my smoke alarm beeping?

If your smoke alarm is sounding continuously, first check there is no smoke or fire in your property. If no fire or smoke is present, or the alarm is beeping intermittently, there are three main reasons why this may be happening:

  • It could indicate the alarm is over 10 years old and needs replacing. View our range of smoke alarms to find a replacement.
  • There could be a build up of dust inside. To clean it, you can use a vacuum cleaner or hair dryer on a cold setting.
  • It could also be an issue with the power supply or the batteries may need replacing.

Read our in-depth smoke alarm troubleshooting guide to find a full list of reasons and solutions.

Q. What is the difference between an ionisation and an optical smoke alarm?

Ionisation smoke alarms detect fast flaming fires, as such they may be prone to false alarming if installed near a kitchen. They are suitable for stairwells, landings and offices. Read more about how ionisation smoke alarms work.

Optical smoke alarms, also known as photoelectric detectors, have a high sensitivity to large particles in the air. They are slightly quicker at detecting slow smouldering fires that produce a lot of smoke (such as fire from soft furnishings). They are suitable for living rooms and sleeping areas and are used near kitchens as they are less prone to false alarms. Read more about how optical smoke alarms work.

See also heat alarms for the most suitable protection in a kitchen.

Q. Can a smoke alarm be fitted with a sticky adhesive pad in a let property?

The sticky pad is suitable for all battery operated smoke alarms. However, we cannot judge if battery alarms are suitable for your let property, as let properties usually require mains powered alarms. There is some advice to this in the governments guides to fire risk assessments. Also see the LACoRS guide for let properties.

Q. What is the best way to dispose of an old smoke alarm or carbon monoxide detector?

Safelincs has signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme*. This means if you are a Safelincs customer you can take old smoke, heat and CO alarms to your local recycling centre.

To find your nearest recycling centre, please visit Find out more about smoke alarm disposal.

*Registration ID: 7370

Pricing & Availability

Model Stock Price
Product Code: FAFA6620-R Stock Level:
More than 20 in stock Expected dispatch: Tomorrow

£20.99 inc VAT

£17.49 ex VAT

Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.99 inc VAT - Orders will be delivered in 3-5 working days with Evri by Hermes

Express Delivery

£8.10 inc VAT - Orders will be delivered in 1-2 working days with Evri by Hermes

Excellent Warranty

This product is supplied with a 5 year manufacturers warranty as standard

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