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10 Year Longlife Battery Optical Smoke Alarm - UltraFire ULLS10

5 out of 5 stars
1 unit 2+ units 5+ units

£13.49 inc VAT

£11.24 ex VAT

£12.89 inc VAT

£10.74 ex VAT

£12.29 inc VAT

£10.24 ex VAT

Product Overview

The UltraFire ULLS10 is a 10 year optical smoke alarm with a sealed lithium battery designed to last the entire lifespan of the alarm, which is powered up automatically when fitted to the mounting plate for easy installation and peace of mind. A combined test & hush button forms almost the entire face of the alarm, which can even silence the end of life warning for up to 10 hours should it occur during the night.

  • Battery: 10 year sealed lithium battery
  • Warranty: 10 year manufacturer's warranty
  • Optical smoke sensor suitable for hallways, landings, living rooms, and bedrooms
  • Smoke detection chamber designed to reduce false alarms and improve detection of real smoke
  • Large test & silence button – almost the whole face of the alarm!
  • End of life warning can be silenced for up to 10 hours
  • Automatically turns on and off when fitted and removed from the base plate
  • Suitable for installations complying to BS 5839-6: 2019 Grade F1
  • CE marked, UKCA marked, and Kitemarked to BS EN 14604: 2005
Technical Data
Product Code UFULLS10
Alternative Product Codes ULLS10
Brand UltraFire
Battery Type

10 Year Sealed Lithium

Dimensions (HxDia)

34 x 84mm

Operating Temperature

5°C to 30°C

Relative Humidity

< 85%

Sound Output


Storage Temperature

5°C to 30°C

Weight 0.08kg
Product Datasheets
FAQs (5)
Q. Can I put my smoke alarm on the wall, or must it be mounted on the ceiling?

The best location to install your smoke alarm is in the centre of the ceiling rather than on the wall.

During a fire, smoke initially rises and then spreads horizontally. Placing the smoke alarm in the centre of your ceiling means that it is closest to all four points of your room. This ensures that you receive the earliest possible warning of a fire.

For more information, read our guide to positioning your smoke alarm and guide to which smoke alarms are best for each room.

Q. How do I test my smoke alarm and how often should I test it?

We recommend testing alarms by pressing the test button built-in to the unit, as this is designed to simulate the detection of the target stimuli (usually smoke, heat, or CO) at the alarm sensor. For more detailed guidance, check the manual included with your alarm.

You should test your alarms regularly, preferably every week. Sign up to our free smoke alarm reminder service to receive regular reminders by email or text message.

Q. How often should I replace my smoke alarm?

You should replace your smoke alarm every 10 years. This is because the sensors in the alarm become less sensitive and may not activate when a fire is present.

Sign up to our smoke alarm reminder service to be reminded by text or email when your alarm is due to be replaced.

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. How do I fit my smoke alarm to the ceiling?

Smoke alarms can be either screwed to the ceiling using the holes on the base plate (screws provided), or fixed in place using either a self-adhesive sticky pad or a self-adhesive magnetic mounting kit.

Pricing & Availability

Model Stock 1 unit 2+ units 5+ units
Product Code: UFULLS10 Stock Level:
More than 20 in stock Expected dispatch: 22nd Aug
1 unit

£13.49 inc VAT

£11.24 ex VAT

2+ units

£12.89 inc VAT

£10.74 ex VAT

5+ units

£12.29 inc VAT

£10.24 ex VAT

Delivery Options

The following delivery options are available on this product.

Free Economy Delivery

Free of Charge - Orders will be delivered in 3-5 working days with Hermes

Express Delivery

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

Excellent Warranty

This product is supplied with a 10 year manufacturers warranty as standard

Customer Reviews

1 customer has 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: W L

Looks neat Looks neat.

Published on: 31st July 2022

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