X-Sense SD11 Smoke Alarm, 10-Year Sealed Battery

The X-Sense SD11 is a single battery-powered smoke alarm with a photoelectric sensor and a listed battery life of 10 years. Its sealed battery avoids routine battery replacement, while customer feedback is mixed on how long the battery and alarm last in practice.

At a glance

Sealed, non-replaceable lithium battery is claimed to last up to 10 years.
Photoelectric sensing and an intelligent chipset are claimed to detect dangerous smoke levels with fewer false alarms.
Self-checking is claimed to notify users of faults or low battery.
The listing claims an 85-decibel alarm and conformity to EN 14604.

Price

£9.40Save 34%

Reference price: ~~£14.18~~

Price checked: 12 Nov 2026

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Often bought together

X-Sense Wi‑Fi Smoke and Carbon Monoxide Alarm, App Control, SC07-WX, 1-Pack | with Replaceable Battery, Smart Fire Alarm Comp

£39.09

X-Sense Wi-Fi Smoke and Carbon Monoxide Alarm, Voice Alerts, XP0A-iR,2-Pack | with Replaceable Battery, Compatible with X-Sen

£63.74

Pros and cons

Pros

Sealed battery means no routine battery changes are described during the stated battery life.
The listed photoelectric sensor and audible alarm make the core smoke-detection function clear.
Package details list a mounting bracket, screws, anchor plugs and a user manual.

Cons

The battery is described as non-replaceable, so it cannot be changed separately if it runs out early.

Technical specifications

11 specifications

Identity
Brand	X-Sense
Model	SD11
Sensor type	Photoelectric
Alarm	Audible
Standard claim	Conforms to EN 14604 Standard, LED Indicator & Silence Button

Power and battery
Power configuration	Battery Powered
Battery life listed	10 years

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

Materials and protection
Material listed	ABS
Operating humidity listed	85% Volume

What to know before buying

The 10-year battery life is a listing claim, not a guarantee of service duration. Customer feedback is mixed, with some reporting early battery depletion and shorter-than-expected durability.

What’s in the box

Included

1 × Smoke alarm
1 × Mounting bracket
Mounting screws
2 × Anchor plugs
User manual

Who is it for?

A good fit for

Buyers wanting a standalone, battery-powered smoke alarm with a sealed battery.
Those looking for a photoelectric sensor and an audible alarm in a one-unit pack.

Less suited to

Buyers who need a replaceable battery, smart or app-connected alerts, or confirmed interlinking. Those functions are not stated for this model.

X-Sense SD11 Smoke Alarm, 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 perceived quality, straightforward fitting and a loud warning alarm. Battery life and durability receive mixed reports, including accounts of early battery depletion, which matters because the SD11 is listed with a sealed, non-replaceable battery and a 10-year life claim. The generally favourable aggregate ratings should be weighed alongside those reported concerns.