# What are the top-rated smart smoke detectors under £200? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the top-rated smart smoke detectors under £200?

## Products

### Ei Electronics Ei650iRF RadioLINK+ Battery Optical Alarm
```yaml
product: ei-electronics-ei650irf-radiolink-battery-optical-alarm
brand: Ei Electronics
price_gbp: 47.19
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
battery_life: 10
connectivity: RadioLINK+ wireless (868 MHz)
temperature_range: -10°C to 40°C
```

- **Price:** £47.19 [^1]
- **Summary:** The Ei650iRF is a battery-powered optical (photoelectric) smoke alarm with a sealed 10-year lithium battery, RadioLINK+ wireless interconnectivity and AudioLINK+ data extraction. It includes dust compensation, tamper-proof design and an integrated piezo sounder producing 85 dB, suited for bedrooms, hallways and homes needing wireless interlinked coverage without mains wiring.
- **Ideal For:** Ideal for top-rated smart smoke detectors under £200 because it has a 10-year sealed lithium battery, RadioLINK+ wireless interconnect and AudioLINK+ maintenance features, offering long life and networked alerts within budget.
- **Additional Sources:** [^2], [^3]

### FireAngel FireAngel ST-630 Z-Wave (Connected Pro)
```yaml
product: fireangel-fireangel-st-630-z-wave-connected-pro
brand: FireAngel
price_gbp: null
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
connectivity: Z-Wave
```

- **Price:** £None [^4]
- **Summary:** The FireAngel ST-630 Z-Wave (Connected Pro) is a Z-Wave enabled smoke alarm designed to integrate with Z-Wave smart home hubs, providing remote notifications and networked alarm capability. It offers loud audible alerts and compatibility with FireAngel's Pro Connected ecosystem for app alerts and interlinked devices, suited for homes using Z-Wave automation.
- **Ideal For:** Suitable for the list because it is Z-Wave connected and provides an 85 dB alarm while selling below typical high-end prices, making it a top-rated smart smoke detector under £200.

### First Alert First Alert SCO7CN
```yaml
product: first-alert-first-alert-sco7cn
brand: First Alert
price_gbp: 35.72
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
battery_life: 7
connectivity: Battery-operated (interconnect not supported)
carbon_monoxide_detection: Yes (electrochemical)
```

- **Price:** £35.72 [^5]
- **Summary:** The First Alert SCO7CN is a battery-powered combination photoelectric smoke and electrochemical carbon monoxide alarm with voice location alerts and an 85 dB siren. It uses two AA batteries, includes selectable voice location for up to 11 preset areas, and has end-of-life and test/silence functions, making it suited for kitchen and general home use. It carries a 7-year limited warranty.
- **Ideal For:** Ideal for shoppers seeking a top-rated smart-capable smoke/CO combo under £200 because it provides CO detection, voice/location alerts, and an 85 dB alarm while requiring only two AA batteries and offering a 7-year warranty.
- **Additional Sources:** [^6], [^7]

### First Alert Onelink Safe & Sound (OneLink)
```yaml
product: first-alert-onelink-safe-sound-onelink
brand: First Alert
price_gbp: 126.64
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
battery_life: 10
connectivity: Wi‑Fi, Bluetooth, Alexa (voice assistant), Apple HomeKit compatible
carbon_monoxide_detection: true
```

- **Price:** £126.64 [^8]
- **Summary:** A hardwired smoke and carbon monoxide alarm with a 10-year sealed lithium backup battery, built-in Alexa-capable speaker, Wi‑Fi (2.4GHz) connectivity and HomeKit compatibility. It combines photoelectric smoke detection and CO sensing with an 85 dB alarm, smartphone alerts via the Onelink app, and a nightlight ring-suitable for smart-home users who want integrated voice assistant and audio in their safety devices.
- **Ideal For:** Suitable for top-rated smart smoke detectors under £200 because it offers 10-year battery backup, Wi‑Fi/HomeKit/Alexa connectivity, CO detection, and an 85 dB alarm, delivering both safety and smart-speaker features within the price category.
- **Additional Sources:** [^9], [^10]

### Kidde Kidde Smart KN-COP-DP-10YL-AQ-WF
```yaml
product: kidde-kidde-smart-kn-cop-dp-10yl-aq-wf
brand: Kidde
price_gbp: 65.74
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
battery_life: 10
connectivity: Wi-Fi
temperature_range: 40°F to 100°F
carbon_monoxide_detection: true
```

- **Price:** £65.74 [^11]
- **Summary:** Plug-in smart carbon monoxide alarm with indoor air quality monitoring (TVOCs), 10-year sealed lithium backup, Wi‑Fi connectivity and app notifications, compatible with Alexa and Google Home. Suits users who want a smart, always‑on CO monitor with remote alerts and a long-life sealed battery.
- **Ideal For:** Ideal for top-rated smart smoke/CO detectors under £200 because it has Wi‑Fi notifications and a 10-year sealed battery, providing long life and remote alerts at a low price.
- **Additional Sources:** [^12], [^13]

---
## References & Sources
[^1]: UES-Online, accessed 2026-06-15. https://ues-online.com/products/ei650irf-radiolink-battery-powered-optical-alarm-with-10yr-lithium-back-up
[^2]: PEC Lights, accessed 2026-06-15. https://www.peclights.com/product/aico-ei650irf-radiolink-battery-optical-alarm-10yr-lithium-battery
[^3]: Huvo, accessed 2026-06-15. https://huvo.co.uk/product/aico-ei650irf-radiolink-optical-smoke-alarm-10-year-battery-dust-compensation-audiolink/
[^4]: Robbshop, accessed 2026-06-15. https://www.robbshop.nl/rookmelder-230v-met-backup-batterij-fireangel#
[^5]: Lowe's, accessed 2026-06-15. https://www.lowes.com/pd/First-Alert-Combination-Photoelectric-Smoke-CO-Alarm-with-Voice/3031857
[^6]: Great Brands Outlet, accessed 2026-06-15. https://www.greatbrandsoutlet.com/store/products/sco7cn-talking-combination-smoke-and-carbon-monoxide-alarm.htm
[^7]: Jasmine Smart Homes, accessed 2026-06-15. https://jasminesmarthomes.com/product/CD1036
[^8]: First Alert Store, accessed 2026-06-15. https://www.firstalertstore.com/store/products/onelink-smoke-and-carbon-monoxide-alarm-with-amazon-alexa-1039102.htm
[^9]: TechHive (price listing), accessed 2026-06-15. https://www.techhive.com/article/583393/first-alert-onelink-safe-sound-review-alexa-in-a-smoke-detector-its-an-inspired-if-expensive-idea.html
[^10]: GearBrain (price listing), accessed 2026-06-15. https://www.gearbrain.com/onelink-safe-sound-review-homekit-2588493376.html
[^11]: The Home Depot, accessed 2026-06-15. https://www.homedepot.com/p/Kidde-Smart-Plug-In-Carbon-Monoxide-Detector-and-Indoor-Air-Quality-Monitor-10-Year-Backup-Battery-KN-COP-DP-10YL-AQ-WF-21031211/320217176
[^12]: BuyRite Electric, accessed 2026-06-15. https://buyriteelectric.com/products/kidde-kn-cop-dp-10yl-aq-wf-carbon-monoxide-alarm-with-indoor-air-quality-monitor
[^13]: Conservation Mart, accessed 2026-06-15. https://www.conservationmart.com/kidde-smart-carbon-monoxide-alarm-with-indoor-air-quality-monitor-kn-cop-dp-10yl-aq-wf-case-of-2-minimum/