X-Sense SD11 Smoke Alarms, 2 Pack, 10-Year Sealed Battery

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Product guide

X-Sense SD11 Smoke Alarms, 2 Pack, 10-Year Sealed Battery

X-Sense SD11 is a two-pack of battery-powered smoke alarms with a sealed lithium battery claimed to last up to 10 years. The listing also describes a photoelectric sensor, self-check alerts and an 85-decibel alarm. Customer feedback is positive about fitting and loudness, but reports on battery life and durability are mixed.

At a glance

Built-in lithium battery is claimed to provide up to 10 years of operation.
The listing describes a photoelectric sensor, self-checking for faults or low battery, and a low-battery warning.
LED indicator and silence button are listed as features.
The manufacturer claims conformity with EN 14604.

Price

£21.37Save 29%

Reference price: ~~£29.99~~

Price checked: 12 Nov 2026

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Often bought together

X-Sense Smoke Alarm for Home with 10-Year Sealed Battery, SD11, 2 Pack | Conforms to EN 14604 Standard, LED Indicator & Silen

Pros and cons

Pros

Two alarms and mounting hardware are listed in the package contents.
Customers report straightforward installation and clear instructions.
Customers describe the warning alarm as loud, consistent with the listed 85-decibel claim.

Technical specifications

12 specifications

Identity
Brand	X-Sense
Model	SD11

Power and battery
Power configuration	Battery Powered
Battery life claim	up to 10 years with the built-in lithium battery

Detection and alerts
Sensor	photoelectric sensor
Alarm sound level	85-decibel
Standard claim	Conforms to EN 14604 standard

Dimensions and installation
Dimensions listed	12.2D x 12.2W x 4.5H centimetres
Weight listed	178 Grams

Appearance and operating conditions
Colour	White
Operating humidity	≤85%

Pack details
Number of items	2

What to know before buying

The up-to-10-year battery life is a manufacturer claim, not a guaranteed service period. Customer feedback is mixed, including reports of batteries running out after six months and alarms not lasting two years. Follow the manual for testing and replacement guidance.

What’s in the box

Included

2 × Smoke Alarms
2 × Mounting Brackets
Mounting screws
4 × Anchor Plugs
User manual

Who is it for?

A good fit for

Buyers needing two battery-powered smoke alarms with mounting brackets, screws and anchor plugs listed in the package.
Those seeking a sealed-battery design with a long stated battery-life claim and self-check alerts.

Less suited to

Buyers who require customer feedback showing consistent long-term battery life or durability.
Buyers seeking a confirmed interconnected or smart alarm system, which is not specified here.

X-Sense SD11 Smoke Alarms, 2 Pack, 10-Year Sealed Battery · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 7,298 ratings

5 stars74%74%
4 stars18%18%
3 stars3%3%
2 stars1%1%
1 star4%4%

Customer feedback highlights easy installation, clear instructions, perceived quality, value and a loud warning alarm. Battery life and durability draw mixed reports, including some accounts of early battery depletion or a shorter-than-expected lifespan. For a sealed-battery alarm advertised for up to 10 years, those reports make long-term reliability an important consideration. Aggregate ratings lean positive overall, but do not explain individual experiences or resolve the mixed durability feedback.

Positive themes

Customers describe installation as easy and instructions as clear.
Customers report that the warning alarm is loud.
Customers express positive views about perceived quality and value.

Mixed feedback

Customer reports on battery life range from praise for the claimed long duration to reports of depletion after six months.
Durability impressions vary, with some reports that units did not last two years.

Frequently asked questions

How many alarms are in the pack?

The listing identifies it as a two-pack, and the included-components list specifies two smoke alarms.

How long is the battery expected to last?

The manufacturer claims up to 10 years for the built-in lithium battery. Customer feedback on battery life is mixed, so treat this as a claim rather than a guaranteed lifespan.

What is included for mounting?

The listed package contents include two mounting brackets, four screws and four anchor plugs, alongside the alarms and one user manual.

Does the listing describe interconnection with other alarms?

No interconnection capability is stated for this SD11 listing.