Winner
Price unavailable right now
Updated November 2026
Data from the official Kidde and X-Sense sites.
2026 verdict
For most buyers in 2026, Kidde Smart Smoke Alarm (P4010ACS-WF) is the safer pick over X-Sense Wi-Fi Carbon Monoxide Alarm because of warranty, battery life, and integrations.
It has the clearer edge on warranty, battery life, and integrations, and it stays ahead on its broader overall balance. X-Sense Wi-Fi Carbon Monoxide Alarm still makes sense if rating, screen, and Built-in light are your priority, but most buyers should still lean toward Kidde Smart Smoke Alarm (P4010ACS-WF). In practical terms, Kidde Smart Smoke Alarm (P4010ACS-WF) is the easier product to recommend.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Works with
Connectivity
- Wi-Fi 2.4 GHz
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The biggest differences
Where these two are furthest apart, and by how much.
- Battery Life10×Kidde Smart Smoke Alarm (P4010ACS-WF)10 years vs 1 year
- Warranty2×Kidde Smart Smoke Alarm (P4010ACS-WF)10 years vs 5 years
| Feature | Kidde Smart Smoke Alarm (P4010ACS-WF) | X-Sense Wi-Fi Carbon Monoxide Alarm | Winner |
|---|---|---|---|
| Rating | 3.3 | 4.6 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Warranty | 10 years | 5 years | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Battery Life | 10 years | 1 year | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Integrations | Google Home, Home Assistant | Home Assistant | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Screen | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Built-in Light | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Sensors | Smoke | CO | Tie |
| Alerts | Fire Alerts, Low Battery Alerts | CO Alerts, Low Battery Alerts | Tie |
| Built-in Siren | YES | YES | Tie |
| Pathlight | NO | NO | Tie |
| Steam Check | NO | NO | Tie |
Winner
Price unavailable right now
- + Warranty: 10 years
- + Battery Life: 10 years
- + Integrations: Google Home, Home Assistant
- - Rating: 3.3 vs 4.6
- - Screen: NO vs YES
£35.99
- + Rating: 4.6
- + Screen: YES
- + Built-in Light: YES
- - Warranty: 5 years vs 10 years
- - Battery Life: 1 year vs 10 years
Frequently Asked Questions
Which is better overall: Kidde Smart Smoke Alarm (P4010ACS-WF) or X-Sense Wi-Fi Carbon Monoxide Alarm?
Kidde Smart Smoke Alarm (P4010ACS-WF) has the stronger overall profile in this comparison, especially for warranty, battery life, and integrations.
What is the biggest difference between Kidde Smart Smoke Alarm (P4010ACS-WF) and X-Sense Wi-Fi Carbon Monoxide Alarm?
Rating is one of the clearest differences: Kidde Smart Smoke Alarm (P4010ACS-WF) lists 3.3, while X-Sense Wi-Fi Carbon Monoxide Alarm lists 4.6.
Who should buy Kidde Smart Smoke Alarm (P4010ACS-WF)?
Choose Kidde Smart Smoke Alarm (P4010ACS-WF) if your priority is warranty and battery life and that matters more than rating.
Who should buy X-Sense Wi-Fi Carbon Monoxide Alarm?
Choose X-Sense Wi-Fi Carbon Monoxide Alarm if your priority is rating and screen and that matters more than warranty.
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