The best smoke alarms, compared.
Top pick: TEFLERON TSS913A 2-pack Best value: STATUS 9 V – Highest listing-and-price score, at about £6.97 with 1,231 reviews, and the listing names no BS EN 14604. Updated October 2026.
A smoke alarm senses smoke and sounds a local warning. On amazon.co.uk the usual buy is a battery optical unit you screw to a ceiling. Optical sensing is what UK fire-safety bodies prefer there. A kitchen needs a heat alarm, and a phone alert is not a siren on another floor. Early-failure reviews are why its hall score is 25 out of 30, not 30. English landlords may use a battery alarm on each living storey. Scotland, Wales and Northern Ireland ask for more. How those checks sit in order is in the [smoke alarm buying guide](/hub/fire-protection/smoke-alarm/sub/smoke-alarm-buying-guide). Shoppers here are owner-occupiers covering a hall, and landlords whose duty depends on the nation. Judge a unit by a BS EN 14604 claim, a sealed long-life battery where batteries are allowed, a test button, and a replace-by date.
A smoke alarm senses smoke and sounds a local warning. On amazon.co.uk the usual buy is a battery optical unit you screw to a ceiling. Optical sensing is what UK fire-safety bodies prefer there.
42 products checked · 64 hrs invested · +22,100 readers
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Personal buying guide
Question 1 of 2
Where will you fit it?
The TEFLERON TSS913A is a two-pack of photoelectric alarms at £12.74, rated 4.6 from 1,228 amazon.co.uk reviews. The title pairs a ten-year life with a five-year replaceable battery, while a spec line also says the battery average life is ten years, so the page does not give you one life figure. It claims EN 14604, 85 dB, a silence button and a self-check every 33 seconds, and the title names a kitchen, a caravan and an office. UK reviewers often call the screw fit straightforward and treat the pair as good value. One unit from a June 2025 pair later alarmed permanently after a new battery and cleaning, and that buyer could not reach the seller, while other reviews describe a heat-linked nuisance alarm and a night alarm with no smoke in sight. Warranty is not stated, and adhesive pads are not supplied. Use the pair when you want two optical alarms near £6.40 each and you will not follow the kitchen wording in the title.
Pros
Cons
Best for: You want two optical alarms for halls or bedrooms and you will replace the battery.
Less suitable: A kitchen over a hob, or a buyer who needs one agreed battery-life figure on the page.
Specifications
Common questions
Is the 10-year line a sealed battery?
No. The bullets say a 10-year sensor life and a replaceable 5-year battery. The spec line also says a 10-year battery average life.
Does the listing include a silence button?
Yes. It describes a test/silence button for cooking steam, and an 85 dB sounder with a red LED.
How do you fit the pair?
Screws and mounting brackets. A stick pad is not listed. One review used double-sided tape instead.
The WISUALARM DHI-HY-SA20A is a photoelectric alarm at £8.94 with 4.6 from 401 reviews. The bullets describe a sealed ten-year battery, while the included-components line also lists a battery, so you cannot tell from the page whether the cell is truly sealed. It claims EN 14604, a TÜV certificate in the title, 85 dB, and a test/silence button that the bullets say can be muted from a TV or air-conditioner remote, which is not in the box. UK reviewers like the sticker option and the light weight of 110 g, and one high-ceiling sticker had held for about three months. Against that ten-year line, one July 2026 order was already making a low-battery style noise, another beeped after about five weeks, and one return was simply because it felt too small. Warranty and UKCA are not stated. Treat it as a low-priced sealed-style alarm only if an early chirp means you replace the unit, and if you check which battery story is in the box.
Pros
Cons
Best for: You want a light alarm near £9 and you will screw or stick it where a fall is obvious.
Less suitable: A buyer who needs one battery story on the listing, or a ten-year life you can already see in reviews.
Specifications
Common questions
Is the battery sealed?
The bullets say a sealed 10-year battery. The included list also names a battery. Reviews include a low-battery noise within weeks.
Can you stick it up?
Yes. An adhesive sticker is included, and so is a screw pack.
How loud is the claim?
85 dB. The listing also claims a test/silence button.
The ELRO FS1801 four-pack is listed at £31.15 with 4.5 from 7,232 reviews, which is about £7.79 an alarm if all four work. The bullets say ten-year protection and also say the battery lasts one year and is replaceable; reviews identify a 9 V cell, which the spec table does not name. UK buyers like having four compact alarms, batteries that arrive wrapped rather than connected, and a loud test for the size. The complaint pattern is a pack problem: three of four false-alarmed after about a year even after a battery change, another set beeped within about three months on new batteries, and one of four was dead on arrival in a separate review. The twist onto the base is called fiddly, the base plate feels flimsy to some, and a tiny red flash annoys light-sensitive sleepers. One buyer expected magnets and received screws. The two-year warranty is short beside the five-year and ten-year lines elsewhere in this set. It suits a house that needs four cheap optical alarms and a diary reminder for the 9 V cell, and it is a poor match if you read “ten-year protection” as a sealed battery.
Pros
Cons
Best for: You need four optical alarms and you will change the 9 V cells.
Less suitable: Anyone who wanted a sealed ten-year battery, or a magnetic mount.
Specifications
Common questions
Does the 10-year protection line mean a sealed battery?
No. The bullets say the battery lasts 1 year and is replaceable, and that you keep the alarm by changing the cell.
Are magnetic pads in the box?
The included list is mounting materials, not magnets. One review expected magnets and received screws.
What warranty is stated?
A 2-year manufacturer warranty.
The X-Sense SD11 is a photoelectric alarm with a non-replaceable 10-year lithium cell, listed at £11.99 with 4.5 from 7,170 reviews. The bullets state 85 dB, a silence button, fault and low-battery reporting, and EN 14604, and the box includes a bracket, two screws and two plugs. UK reviewers praise the screw-and-twist fit and a replace-by date printed on the unit, though one buyer found that date two or three months short of ten years on arrival. Separate reviews report the sealed cell dead at about four years, about two years, and about two and a half years, so the ten-year line is a claim rather than a result you can read off the stars. A test press of about four to five seconds made some buyers think a working unit was faulty. One of two units chirped every minute and the seller had not replied, and the listing does not state UKCA. The SD11 manual says this model is not tested for caravans. Choose it when you want the higher star line and a stated 85 dB at the same sort of shelf price as the FireAngel one-pack.
Pros
Cons
Best for: You want a sealed optical alarm near £12 with a printed sound level.
Less suitable: A caravan, or a buyer who wants UKCA printed on the amazon.co.uk page.
Specifications
Common questions
Is the SD11 battery replaceable?
No. The listing describes a built-in non-replaceable lithium battery with a 10-year life claim. Reviews include units that failed at about 2 to 4 years.
How loud is it?
The bullets state an 85-decibel alarm. The spec field says audible.
What is the stated warranty?
60-day money-back guarantee, a 5-year quality warranty, and lifetime technical support.
The BLACK+DECKER BD/BOP is a photoelectric alarm at £6.99 with 4.5 from 78 reviews. The title says “10 Year Life” and the spec says the battery average life is one year on a replaceable 9 V carbon-zinc cell, so the headline and the table describe different jobs. The listing claims BS EN 14604:2005+AC:2008, CE and UKCA, a hush on the test button, a low-battery warning and a three-year warranty. UK reviewers like the screw fit, the included 9 V cell and an expiry-date label. They also report batteries dead on arrival, sticky tape that was not strong enough, a body that is narrower and deeper than older flat discs, and home smoke tests that were slow or that did not react. Seventy-eight reviews is a modest file next to the thousand-review alarms at a similar price. Buy it if you want a named brand, a BS EN line and a cell you can change, and read the one-year battery spec rather than the ten-year title.
Pros
Cons
Best for: You want a cheap 9 V alarm with BS EN 14604 printed and you will replace the cell yearly.
Less suitable: Anyone who bought it as a sealed ten-year alarm, or a ceiling fixed only with the sticky pad.
Specifications
Common questions
Is the 10-year line the battery?
The title says 10 year life. The spec line says battery average life of 1 year, and the cell is a replaceable 9 V carbon-zinc battery.
Does it have a hush control?
Yes. The hush feature is part of the test button, and a low-battery warning is stated.
Which standard is claimed?
BS EN 14604:2005+AC:2008, plus CE and UKCA.
The XUK PA-437EN is a battery alarm with 2.4 GHz Wi-Fi, listed at £21.99 with 4.5 from 13 reviews, all of them from the United Kingdom in the saved listing. The highlight claims a ten-year life and a replaceable battery; reviewers describe a 9 V or PP3 cell, including a long-life PP3. Bullets claim photoelectric and ionisation together, 85 dB, and alerts in Tuya or Smart Life, and the listing does not name BS EN 14604 or UKCA. People who already used Smart Life found setup short, and one buyer tested it with smoke and was satisfied. The same small file calls the body bulky, says the app has monitoring but no test control, and includes one buyer who struggled to add the device. Phone alerts are not radio interlink between alarms, and with 13 ratings the 4.5 line can move on a handful of new reviews. It is a garage or workshop extra for someone already in Smart Life or Tuya, not a hall alarm you would pick because a standard is printed on the page.
Pros
Cons
Best for: You already use Smart Life or Tuya and want a phone alert from a garage or workshop.
Less suitable: A hallway alarm chosen on a printed standard, or a home that must interlink sounders.
Specifications
Common questions
Which app does the listing name?
Tuya and Smart Life, on 2.4 GHz Wi-Fi. Reviews describe phone alerts. One review says the app has no test button.
Is a British Standard named?
No. The listing does not state EN 14604 or UKCA.
Does Wi-Fi mean the alarms interlink?
The listing claims phone alerts. It does not say other smoke alarms in the home will sound together.
The STATUS 9VDCPESA5 is a photoelectric alarm at £6.97, the lowest price in this set, with 4.4 from 1,231 reviews. A 9 V battery is included, the bullets state a test button and a low-battery alert, and the listing does not name BS EN 14604 or UKCA. UK reviewers often finish a screw fit in under half an hour and like the price for a rental, and one buyer uses it in a motorhome. The battery complaints are the reason it is not a sealed-cell substitute: cells dead within about seven months on four of five units, cells that do not last a year, a flat 9 V in the box, and an alarm that worked for a year then sounded with no smoke even after a new battery. One review says it did not ring in a smoke try. The screws are described as thin, with a thread too short for the plugs, and a red flash was bright enough that one buyer painted it and still saw light leak. It is the best value pick here on shelf price and review count, not on a printed standard, and only if you will keep spare 9 V cells.
Pros
Cons
Best for: You want the cheapest optical alarm in this set and you will change the 9 V cell.
Less suitable: A Scottish home, a new-build mains requirement, or a buyer who needs a standard named on the page.
Specifications
Common questions
Does the listing name BS EN 14604?
No. The listing does not state a British Standard or UKCA mark.
Is the battery sealed for 10 years?
No. It is a replaceable 9 V cell supplied in the box. Reviews include cells that failed within a year.
Does it have a low-battery warning?
Yes. The title and bullets include a low-battery warning and a test button. A hush button is not stated.
The WISUALARM S01 is a photoelectric alarm at £6.99 with 4.4 from 272 reviews, powered by two replaceable AA cells that the title says should last five years, beside a ten-year lifespan line for the alarm. The listing claims EN 14604 and UKCA, 85 dB, and a test/silence button, and reviews say the AA batteries are in the box. UK buyers like ordinary AA cells instead of a 9 V battery, and they like the pad as an option if they do not want to drill. The test button is described as stiff once the alarm is on the ceiling, the battery cover is hard to close unless the cells go in first, and the instructions did not say that. Random alarms and false low-battery warnings on a new cell appear in the file, and a July 2025 loft install was already not matching the ten-year wording for one buyer. Supplied screws felt too short for someone who rejected the pad. It is a cheap optical alarm with a printed UKCA mark if you will seat the batteries before you close the back, and a weak one if you wanted a sealed cell.
Pros
Cons
Best for: You want a cheap optical alarm with a printed UKCA mark and you will change AA cells.
Less suitable: A sealed unit, or a ceiling where a short screw and a doubtful pad are your only fixings.
Specifications
Common questions
Which batteries does it use?
Two replaceable AA cells, with a 5-year claim. The title also says a 10-year lifespan for the alarm.
Does it claim UKCA?
Yes. The title says it conforms to EN14604 and carries UKCA.
How is it fixed?
Adhesive pads and screws are both described. Reviews say the battery cover is awkward until the cells are fitted.
The FireAngel FA6620 one-pack is a photoelectric alarm with a sealed lithium cell, listed at £11.98 on amazon.co.uk with 4.3 from 8,044 reviews, and it is number 1 in Smoke Alarms on that capture. The listing claims BS EN 14604:2005+AC:2008 and UKCA, a quiet self-test, and a baseplate the bullets say matches the ST622. UK reviewers often describe a screw-and-twist fit, and some reused an older FireAngel plate, though one report says it did not fit an ST-620. The same file includes separate accounts of the sealed cell failing at about four years, about three years, and under three years, and you cannot swap that cell. A five-year manufacturer warranty is shorter than the ten-year battery line, and one buyer said warranty emails went unanswered after a two-year failure. The listing tells you to avoid bathrooms and kitchens, and one review describes an alarm in a spare room that had fallen below 10 degrees. It is the top pick in this set for a hall or landing in an existing English home if you want the largest UK review file and a stated UKCA mark, with those early-failure reports kept in view.
Pros
Cons
Best for: You want one sealed optical alarm for a hall or landing and you will replace the whole unit if it chirps early.
Less suitable: A kitchen, a Scottish home that needs interlinked alarms, or a buyer who must keep an ST-620 plate.
Specifications
Common questions
Can you change the battery in the FA6620 one-pack?
No. The listing fits a 10-year sealed battery and includes the alarm complete with that cell. The warranty stated is 5 years.
Does FireAngel say to use this in a kitchen?
No. The bullets say to avoid bathrooms and kitchens because of nuisance alarms.
Will it fit an older FireAngel base?
The bullets say the base plate matches the ST622. One review says it did not fit an ST-620 plate. Another reused an SO-601 plate.
The FireAngel FA6620 two-pack, model FA6620-R-T2, is the same optical family as the one-pack, listed at £25.00 with 4.3 from 4,864 reviews. Each unit has a sealed lithium cell, the listing claims BS EN 14604:2005+AC:2008 plus CE and UKCA, and the warranty is five years. UK reviewers like the twin pack for replacing older FireAngel alarms, and one former firefighter said this is the type they fitted for the public. The failure reports are sharper than a single early death: both units in a July 2024 pair failed after about two years and two months, other reviews cite dead batteries at about four years, 18 months and 15 months, and one buyer says four of eight units failed within about a year. A review found speaker film still covering the sounder hole on one of four units, and several people call the alarm quieter than the one it replaced. The cell is described as spot-welded, so you replace the alarm rather than the battery. Buy the twin when you need two of this model and £25.00 beats two one-packs on the day you order; the two alarms still do not sound together.
Pros
Cons
Best for: You want two FireAngel FA6620 alarms and the twin price beats two singles.
Less suitable: One room only, or a home that needs the alarms to sound together.
Specifications
Common questions
Is this the same listing as the FA6620 one-pack?
No. This ASIN is FA6620-R-T2, a 2-pack at £25.00. The one-pack is a different ASIN.
Can you swap the sealed cells?
The listing says each alarm has a 10-year sealed battery. One review says the cell is spot-welded.
Do the two alarms interlink?
The listing does not say they interlink. They are two standalone optical alarms.
The ELRO FS4610 is a photoelectric alarm 2.3 cm deep, listed at £21.99 with 4.2 from 987 reviews and a ten-year manufacturer warranty on a built-in battery you do not replace. The title also cites DIN EN 14604, a STIWA “Gut” mark and a Q label, and UKCA is not on the page. Only seven of the first 50 reviews in the saved listing are from the United Kingdom, so the 4.2 figure is the whole listing. Those UK notes praise the low profile, a test that was loud enough to wake the reviewer, and a discreet LED. They also say the alarm is not wireless, and one buyer who expected a magnetic mount received screws. At £21.99 it costs more than the FireAngel and X-Sense one-packs in this set. Choose it when 2.3 cm of depth is the point, and skip it if you wanted the alarms to sound together.
Pros
Cons
Best for: You want a slim sealed alarm and you accept the higher price.
Less suitable: A linked system, or a buyer judging it on a large UK review sample.
Specifications
Common questions
How thick is the FS4610?
The listing says 2.3 cm and calls it an ultra-slim detector. Dimensions are 11.5 × 11.5 × 2.3 cm.
Does it interlink?
No. A UK review says it is not wireless and cannot be interconnected. The listing does not claim interlink.
Does the box include a magnetic mount?
The included list is mounting material. A UK review expected magnets and received screws.
The Heiman HM-HK-HS1SA is a mini photoelectric alarm at £15.99 with 3.9 from 15 reviews, and all 12 written reviews in the saved listing are from the United Kingdom. The bullets claim up to ten years on a 3 V lithium cell, plus UKCA, EN 14604 and LPCB, and the title calls it independent. Reviewers like the size, which the listing says is up to 62 percent smaller than a traditional alarm, and they describe a loud test in a small room. The mounting story splits: reviews mention screws and a sticker, while the included-components line lists the alarm and a battery only. One sticker on a smooth ceiling lasted about ten hours before the alarm fell, and one buyer says the unit does not lock firmly onto the base. A review title calls it wireless, which the product title contradicts. Fifteen ratings are too few to treat 3.9 as a stable score, and warranty is not stated. It is a size experiment for a small room if you screw it, not a default hall alarm.
Pros
Cons
Best for: You want a small alarm in a small room and you will screw it.
Less suitable: A ceiling you will not drill, or anyone choosing on a large review file.
Specifications
Common questions
How small is it?
The spec line is 6 × 5 × 6 cm and 81.6 g. The bullets claim up to 62 percent smaller than a traditional alarm.
Which marks does the listing name?
UKCA, EN14604, CE, LPCB, RoHS and DBI. That is the bullet text, not a certificate checked here.
Does the included list contain screws?
The included line says the smoke alarm and the battery. Reviews mention screws and a sticker. One sticker failed after about 10 hours.
This page compares 12 battery smoke alarms from amazon.co.uk listings captured on 19 October 2026. The score runs from 0 to 100: stars out of 30, the size of the review file out of 25, hall fit out of 30, and listing and price out of 15. The job is a battery optical smoke alarm for a hall or landing. A Wi-Fi extra, a kitchen line in the title, or a ten-year sentence that means a one-year cell does not win on stars alone. There is no lab test.
Hall fit
30%Hall fit scores a photoelectric sensor, a BS EN 14604 or EN 14604 claim, UKCA, a sealed cell with no contradiction, and a quiet test or silence control. It drops if UK reviews describe early failure or false alarms, if the title names a kitchen, or if a ten-year line clashes with a one-year cell.
Stars
30%The amazon.co.uk star rating is mapped to 30 points. A 4.6 becomes 28 and a 4.5 becomes 27. Stars are one part of the score, not the rank on their own.
Review sample
25%Larger amazon.co.uk review files score higher. A file of 5,000 or more scores 25. Under 30 reviews scores 6. The listing count on the 19 October 2026 capture is used.
Listing and price
15%The lowest shelf price with 1,000 or more reviews scores 15. That is why the STATUS 9 V, at about £6.97 with 1,231 reviews, is the best value. The award is the price part, not a standards claim.
Judge a smoke alarm by the room, an optical sensor, a battery that matches the nation, and a BS EN 14604 claim. Stars come after that. The notes below are the same checks used to score the 12 amazon.co.uk listings on this page. There is no lab result behind them.
A smoke alarm is a self-contained detector that senses smoke and sounds a local warning. On amazon.co.uk the usual buy is a battery optical unit you screw to a ceiling. Shoppers here are owner-occupiers covering a hall, and landlords whose duty depends on the nation. Judge a unit by a BS EN 14604 claim, a sealed long-life battery where batteries are allowed, a test button, and a replace-by date. Optical sensing is what UK fire-safety bodies prefer in halls.
Steam and cooking cause nuisance alarms. London Fire Brigade keeps smoke alarms out of kitchens and bathrooms. A kitchen needs a heat alarm. A title that says kitchen does not change the sensor.
The ELRO FS1801 four-pack says ten-year protection and also says the battery lasts one year and is replaceable. The BLACK+DECKER title says ten-year life and the spec says a one-year 9 V cell. Read the battery line, not only the headline.
A battery alarm can meet the English landlord duty and still fail a Welsh mains duty or a Scottish interlinked layout. This set has no mains alarm and no radio interlink. Call an electrician for those jobs.
Photoelectric, or optical, sensing is what UK fire-safety bodies prefer in halls, landings and living rooms. Do not buy a smoke alarm for the kitchen. A kitchen needs a heat alarm. Only the XUK PA-437EN claims photoelectric and ionisation together, and it does not name BS EN 14604. Every other alarm here is photoelectric. GOV.UK and Fire Kills prefer a ten-year sealed battery over a one-year cell, where a battery alarm is allowed.
Start with nation and tenure. English landlords may use a battery alarm on each living storey. A new English dwelling is guided to mains alarms: Grade D2, Category LD3, BS EN 14604. Scotland wants interlinked ceiling alarms and a kitchen heat alarm, and sealed long-life lithium batteries are allowed. User-replaceable cells are not that route. Many Welsh rented homes need a mains interlinked alarm on each storey. Northern Ireland private tenancies need interlinked smoke and heat alarms.
Three typical situations, each with a recommendation from this comparison.
You want one sealed optical alarm for an existing English home, with BS EN 14604 and UKCA on the listing. The FireAngel FA6620 one-pack is the top pick at about £11.98. Early-failure reviews mean you replace the whole unit if it chirps inside the ten-year claim.
You want the cheapest optical alarm in this set and you will keep spare 9 V cells. The STATUS 9 V is the best value at about £6.97, with 4.4 from 1,231 reviews. The listing does not name BS EN 14604 or UKCA, so the award is the price.
You already use Smart Life or Tuya and you want a phone alert from a garage or workshop. The XUK PA-437EN claims 2.4 GHz Wi-Fi at about £21.99, from 13 reviews. It does not name BS EN 14604, and a phone alert is not interlinked sounders.
The FireAngel FA6620 one-pack leads this set for a sealed optical hall alarm with BS EN 14604, UKCA and the largest review file, at about £11.98 with 4.3 from 8,044 reviews. Early-failure reviews are why hall fit is 25 out of 30, not 30. The STATUS 9 V is the best value because its listing-and-price part is the highest, on the about £6.97 shelf price and 1,231 reviews. That award is not a standards claim. The STATUS listing does not name BS EN 14604.
STATUS 9 V
Highest listing-and-price score, at about £6.97 with 1,231 reviews, and the listing names no BS EN 14604.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources, last checked on 19 October 2026.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the 19 October 2026 listings. We did not run a lab test.
