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Best ABUS smoke alarm

Updated: 20 October 2026

You want one ABUS smoke alarm from amazon.co.uk, and the highest star line is the wrong place to start. The Prefira Smart is 4.6 from six reviews at about £52.17, which does not show how a battery behaves after a year. This page names a top pick and a best value with a criterion for each, and it says who should skip both. Prices and stars are the amazon.co.uk captures used on 19 October 2026 by the Products Compared editorial team. We did not run a lab test. A qualifying purchase can earn us a commission at no extra cost to you. The full cards sit on the [ABUS smoke alarm comparison](/hub/fire-protection/abus-smoke-alarm).

You want one ABUS smoke alarm from amazon.co.uk, and the highest star line is the wrong place to start. The Prefira Smart is 4.6 from six reviews at about £52.17, which does not show how a battery behaves after a year.

Our top picks

ABUS ABUS Prefira 5

Best overall

ABUS ABUS Prefira 5
8.8/10about £11.28
View offer
ABUS ABUS Prefira Slim

Rank 2

ABUS ABUS Prefira Slim
8.4/10about £23.65
View offer
ABUS ABUS RWM150

Alternative

ABUS ABUS RWM150
7.4/10about £20.23
View offer
On this page
  1. 1.Best for a sealed battery
  2. 2.Best value if you will change the cells
  3. 3.When the RWM150 is the wrong pick
  4. 4.When the Smart alarm is the only one that fits

Best for a sealed battery

The top pick is the ABUS Prefira Slim, model 36395, at about £23.65. The criterion is a sealed battery with a listing claim of up to 10 years, EN 14604 on the page, a Q-Label claim, a magnetic mount, and no app. amazon.co.uk shows 4.2 from 26 reviews. Skip the Slim if you need a long UK review history before you trust a sealed cell. Twenty-six reviews cannot prove ten years. Skip it if you need the alarms in the house to sound together, because this listing does not show radio interlink.

Best value if you will change the cells

The best value is the ABUS Prefira 5, model 35552, at about £11.28. The criterion is the lowest shelf price in this set among alarms with a review file you can actually read: 4.4 from 78 reviews. The batteries are replaceable and rated up to five years. ABUS describes two AAA cells on the Prefira 5 page. There is no adhesive pad on that page, so a rental ceiling you cannot drill is a reason to look back at the Slim. It is the right buy when you will keep spare cells in a drawer. It is the wrong buy when you wanted to fit the alarm and forget the battery for a decade.
ABUS ABUS Prefira 5

Testsieger

ABUS ABUS Prefira 5
8.8/10about £11.28
View offer

When the RWM150 is the wrong pick

The ABUS RWM150 is about £20.23, with 3.7 from 1,421 reviews. In the first 50 reviews the repeated story is that the sealed cell failed early. The times people name sit around 10 months and around 1.5, 2, 3, 3.5 and 4 years. You cannot open the unit and fit a new cell. A chirp means a replacement alarm. Buy the RWM150 only after you have read that pattern and you still want this housing. Do not buy it because a 2021 German magazine score looks tidy next to a 3.7 star line. The RWM150 or Prefira page stays on that split. If your question is whether a landlord in England can use any of these at all, that is the landlord smoke alarm rules page, and best on this page does not mean the alarm meets Scottish law.

When the Smart alarm is the only one that fits

The Prefira Smart, model 36421, is the only alarm in this set that talks to a phone. It is listed at about £52.17, with a replaceable battery rated up to five years. The listing says push alerts need a Matter-enabled Thread Border Router, and the router is not in the box. One United Kingdom review on 2 October 2026 says it works with Home Assistant. Another review could not connect it to the phone. Six reviews is the whole sample behind the 4.6 line. A phone message does not make the alarm on the landing sound. If you do not already run Thread, you are paying about £52.17 for a small replaceable-battery optical alarm that still needs a hub you do not own. If you do run Thread, and you accept a short review file and a cell you will change, the Smart is the only listing here that matches that job.

Common questions

Which ABUS smoke alarm is the top pick, and for whom?
The top pick is the Prefira Slim at about £23.65 if you want a sealed battery, EN 14604 on the listing, a Q-Label claim and no app. It is 4.2 from 26 reviews on amazon.co.uk. Skip it if you need years of UK ownership reports, or alarms that sound together across the house. These prices are from the 19 October 2026 captures, so check the live page before you order.
Which is the best value if I will change the batteries?
The Prefira 5 at about £11.28 is the best value, with 4.4 from 78 reviews and replaceable cells rated up to five years. ABUS describes two AAA cells for this model. Skip it if you wanted a sealed unit you never open. The listing includes screws and wall plugs, and it does not include the magnetic pad that comes with the Slim.
Should I avoid the RWM150 because of the rating?
The 3.7 from 1,421 reviews lines up with a sealed cell that failed well inside the 10-year claim. In the first 50 reviews people name about 10 months and roughly one and a half to four years. Avoid it if you are buying the 10-year sentence. Read those reviews first if you still want the model at about £20.23.
Is the Prefira Smart the best because it scores 4.6?
No. Six reviews cannot show a five-year cell or a reliable join to your phone. One UK note says Home Assistant works, and one review could not connect. The Smart is the right alarm only when a Thread Border Router is already in the house. The router is not in the box, and the alerts do not interlink other smoke alarms.
Does best mean it meets Scottish law?
No. A Scottish home needs interlinked smoke alarms in the living room and every hall, plus a heat alarm in the kitchen. None of these four listings radio-links to the others, and none is a heat alarm. England, Scotland, Wales and Northern Ireland differ, so do not treat this pick as a UK-wide legal answer.

Related pages

ABUS smoke alarm buying guide

ABUS smoke alarm

How to fit an ABUS smoke alarm: ceiling, test, replace

Landlord smoke alarm rules across the four UK nations

ABUS RWM150 or Prefira: which sealed alarm to choose

Sources

Public UK sources from the research digest. Listing prices, stars and review counts are the amazon.co.uk lines captured on 19 October 2026.

  1. GOV.UK — Smoke and carbon monoxide alarm regulations, landlord booklet (retrieved 19 October 2026)
  2. GOV.UK — Approved Document B fire safety FAQ (retrieved 19 October 2026)
  3. Scottish Government — Tolerable standard, fire and carbon monoxide detection (retrieved 19 October 2026)
  4. Scottish Fire and Rescue Service — Smoke and heat alarms (retrieved 19 October 2026)
  5. legislation.gov.uk — Wales, The Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022 (retrieved 19 October 2026)
  6. legislation.gov.uk — Northern Ireland private tenancies regulations 2024 (retrieved 19 October 2026)
  7. Fire Kills — Detection (retrieved 19 October 2026)
  8. ABUS UK — RWM150 smoke alarm (retrieved 19 October 2026)