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Best magnetic smoke alarm mount

Updated: October 2026

You want one pack for a flat with a smooth ceiling and more than one battery alarm, and a clear reason to leave the others in the basket. The best magnetic smoke alarm mount in this set is the ECENCE 70 mm ten-pack, because the disc matches a normal flat back and the pack covers several rooms. The checks themselves sit on the [smoke alarm magnet buying guide](/hub/fire-protection/smoke-alarm-magnet/sub/smoke-alarm-magnet-buying-guide). This page applies them to the four amazon.co.uk listings on our [smoke alarm magnet comparison](/hub/fire-protection/smoke-alarm-magnet), priced on 20 October 2026. Peter F. did not lab-test the plates. A qualifying purchase through our links can earn us a commission at no extra cost to you.

You want one pack for a flat with a smooth ceiling and more than one battery alarm, and a clear reason to leave the others in the basket.

Our top picks

ECENCE ECENCE 70 mm magnetic mount, 10 pieces

Best overall

ECENCE ECENCE 70 mm magnetic mount, 10 pieces
9.5/10about £11.99
View offer
ECENCE ECENCE 50 mm magnetic mount, 10 pieces

Best value

ECENCE ECENCE 50 mm magnetic mount, 10 pieces
9.3/10about £10.99
View offer
ECENCE ECENCE 50 mm magnetic mount, 3 pieces

Rank 3

ECENCE ECENCE 50 mm magnetic mount, 3 pieces
7.8/10about £5.99
View offer
On this page
  1. 1.What best means here
  2. 2.Ten 70 mm plates
  3. 3.When 50 mm is the one to buy
  4. 4.Who should skip all four
  5. 5.Which pack for which home

What best means here

Best, on this page, means a stated diameter for a full-size battery alarm, a pack for several rooms, and a large review file that is not a UK census. Two ECENCE ten-packs share 4.6 stars. The 70 mm pack has 2,047 reviews and the 50 mm pack has 1,842. Stars that close do not say which disc fits. None of the four includes a smoke alarm. BS EN 14604 applies to the alarm, not the plate. Safelincs wants a flat, clean surface, matt emulsion in mind, for its own kit at about £4.39. A strong click on a rough ceiling is the magnet working while the adhesive has nothing continuous to wet.

Ten 70 mm plates

For several ordinary battery alarms on a sound, smooth ceiling, buy ECENCE B01FUFN6MS. The title states 70 mm. The price is about £11.99, about £1.20 a plate. The bullets claim 500 g, a 10-second press, and a sideways push. They do not state a cure time in hours. There is no detector in the box. Safelincs talks about bases at least 70 mm across, or 60 mm along each edge. Bellman & Symfon sells a kit at about £7.37 for alarms at least 70 mm. Do not copy 550 g from the other listing B01FUFN1PK. Only six of the first 50 reviews are from the United Kingdom. If the alarm is compact, you are paying for contact you may not have.
ECENCE ECENCE 70 mm magnetic mount, 10 pieces

Testsieger

ECENCE ECENCE 70 mm magnetic mount, 10 pieces
9.5/10about £11.99
View offer

When 50 mm is the one to buy

Buy the ECENCE 50 mm ten-pack, B07G18J8DY, when the alarms are smaller and you have several. It is about £10.99, 4.6 from 1,842 reviews, and the bullets claim 500 g. About £1.10 a plate is why it is the best value pack, not the top pick. Count ten plates from the title, because the photo matches the three-piece page. The two listings share one Best Sellers Rank line. Buy the three-piece, B07G1BF811, for one hallway alarm and a spare, at about £5.99. Reviews include falls after days, and a comment that 50 mm was unsuitable for larger and interlinked alarms. That warning covers both 50 mm packs.

Who should skip all four

Skip every pack if the ceiling is textured, papered, dusty, glossy, or freshly filled. The textured ceiling page is the stop. The IME three-piece, B0DCG9MFZ9, is about £5.99 with 3.8 from 56 reviews, sized 5 × 5 × 1 cm, with no diameter and no load in grams. The bullets say 3M tape. A UK review says the pad is not 3M branded, and several say the alarm was down within a week. Skip the plates if the alarm is mains-powered, if you cannot reach the ceiling safely, or if a remedial notice has been served. A magnet cannot interlink alarms for a Scottish home. Skip the aisle if the alarm is still unbought.

Which pack for which home

Choose the 70 mm ten-pack for larger flat backs on a smooth ceiling. Choose the 50 mm ten-pack for several compact alarms. Choose the three-piece for one small alarm and a spare. Leave every adhesive plate when the paint is rough or the alarm is mains. The table is not a fire-service approval.

Common questions

Which pack if I have several full-size alarms?
The ECENCE 70 mm ten-pack at about £11.99, if each flat back is around 70 mm and the ceiling is smooth. You get ten plates at about £1.20 each, a 500 g claim, and 4.6 from 2,047 reviews that are not all from the UK. A 50 mm ten-pack is the wrong diameter for that base.
Is the 4.6 score a reason to ignore falls?
No. Both ten-packs are 4.6, and the three-piece is 4.5 from 1,245 reviews, yet that file still describes alarms that fell after days. The usual failure is the adhesive leaving the paint, not a weak click. If the surface is rough, the stars do not change the advice to use screws or ask for help.
Is the IME pack at about £5.99 the best value?
No. It matches the ECENCE three-piece at about £5.99, then loses on the listing. You do not get a stated diameter or a gram load. The star line is 3.8 from 56 reviews, with falls within a week, and a UK reviewer disputes the 3M tape claim. Best value here is the 50 mm ten-pack at about £1.10 a plate, and only when 50 mm fits.
When is a three-piece 50 mm pack enough?
When you are fitting one small battery alarm and you want a spare plate, and the flat back suits 50 mm. The ECENCE three-piece is about £5.99 and names three holders. It is the wrong pack for a run of rooms, for a 70 mm base, or if you want the lower price per plate of a ten-pack. Some buyers still reported the alarm down after days.
Are the 2,047 ratings all from the UK?
No. On the 70 mm ten-pack, six of the first 50 reviews are from the United Kingdom. Treat 2,047 as the amazon.co.uk listing total, not as a UK sample of that size. The two 50 mm pages also share one Best Sellers Rank line. The ECENCE files are large and the IME file is small. That is not a headcount of British ceilings.

Related pages

50 mm or 70 mm smoke alarm magnet

Smoke alarm magnet

Smoke alarm magnet buying guide: plates, not alarms

How to fit a magnetic smoke alarm mount, then test

Smoke alarm magnet on a textured ceiling will fail

Sources

Public UK sources from the research digest, retrieved 20 October 2026. Listing prices, stars, and review counts are the amazon.co.uk figures stored with this comparison.

  1. Fire Kills — detection (retrieved 20 October 2026)
  2. GOV.UK — fire safety in the home (retrieved 20 October 2026)
  3. GOV.UK — smoke and carbon monoxide alarms, landlord booklet (retrieved 20 October 2026)
  4. legislation.gov.uk — Smoke and Carbon Monoxide Alarm (England) Regulations 2015 (retrieved 20 October 2026)
  5. Scottish Government — fire and smoke alarms in Scottish homes (retrieved 20 October 2026)
  6. Scottish Government — tolerable standard, fire and carbon monoxide detection (retrieved 20 October 2026)
  7. Safelincs — magnetic alarm mounting kit (retrieved 20 October 2026)
  8. Bellman & Symfon UK — magnetic mount kit (retrieved 20 October 2026)