Winner
Price unavailable right now
Data from the official Google and Kidde sites.
2026 verdict
Across the 2026 comparison, Google Nest Protect (Battery) earns the nod over Kidde Smart Smoke Alarm (P4010ACS-WF) on the strength of rating, connectivity, and sensors.
It separates itself most clearly on rating, connectivity, and sensors, while still looking better on alerts and Built-in light. You should still consider Kidde Smart Smoke Alarm (P4010ACS-WF) if warranty and battery life matter more than raw overall balance. As a general recommendation, Google Nest Protect (Battery) comes out on top.
Works with
Connectivity
- Wi-Fi 2.4 GHz
- Bluetooth
vs
Price unavailable right now
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.
- Warranty5×Kidde Smart Smoke Alarm (P4010ACS-WF)10 years vs 2 years
- Battery Life5×Kidde Smart Smoke Alarm (P4010ACS-WF)10 years vs 2 years
| Feature | Google Nest Protect (Battery) | Kidde Smart Smoke Alarm (P4010ACS-WF) | Winner |
|---|---|---|---|
| Rating | 4.4 | 3.3 | Google Nest Protect (Battery) |
| Warranty | 2 years | 10 years | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Battery Life | 2 years | 10 years | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Other | 2.4 GHz WiFi | Google Nest Protect (Battery) |
| Sensors | Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion | Smoke | Google Nest Protect (Battery) |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts | Google Nest Protect (Battery) |
| Built-in Light | YES | NO | Google Nest Protect (Battery) |
| Pathlight | YES | NO | Google Nest Protect (Battery) |
| Steam Check | YES | NO | Google Nest Protect (Battery) |
| Integrations | Google Home, Home Assistant | Google Home, Home Assistant | Tie |
| Screen | NO | NO | Tie |
| Built-in Siren | YES | YES | Tie |
Winner
Price unavailable right now
- + Rating: 4.4
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Other
- + Sensors: Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion
- - Warranty: 2 years vs 10 years
- - Battery Life: 2 years vs 10 years
Price unavailable right now
- + Warranty: 10 years
- + Battery Life: 10 years
- - Rating: 3.3 vs 4.4
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Bluetooth, Other
Frequently Asked Questions
Which is better overall: Google Nest Protect (Battery) or Kidde Smart Smoke Alarm (P4010ACS-WF)?
Google Nest Protect (Battery) has the stronger overall profile in this comparison, especially for rating, connectivity, and sensors.
What is the biggest difference between Google Nest Protect (Battery) and Kidde Smart Smoke Alarm (P4010ACS-WF)?
Rating is one of the clearest differences: Google Nest Protect (Battery) lists 4.4, while Kidde Smart Smoke Alarm (P4010ACS-WF) lists 3.3.
Who should buy Google Nest Protect (Battery)?
Choose Google Nest Protect (Battery) if your priority is rating and connectivity and that matters more than warranty.
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.
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- 28 Smoke & CO Detectors
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