Google Nest Protect 2nd Gen Battery

Model details

Additional useful information

Use this Scanual guide to identify Google Nest Protect 2nd Gen Battery, follow official setup and reset guidance, and match power, radio, mounting, hub, and regional accessories to model Nest Protect 2nd Gen Battery.

Google Nest Protect second-generation battery model combines photoelectric smoke and electrochemical carbon-monoxide sensing, six specified lithium AA cells, app alerts, and ten-year replacement life.

Setup: Add the battery Protect in the Nest app, scan its QR code, mount the battery-specific backplate at a code-approved location, and run the built-in alarm test before relying on alerts.

Reset: Hold the Nest button until the device announces its version, continue through the countdown, and release when instructed. Reset removes network and app association but does not extend the ten-year expiry.

Troubleshooting: For chirps, read the app and spoken reason, install six fresh specified L91 cells, check expiry, clean as directed, and run a manual test. Any failed alarm test requires prompt replacement.

Compatibility and ecosystem boundary: The battery unit uses six L91 cells and no 120V harness. Wired-version backplates, connectors, and three-cell backup instructions do not apply; interconnect is wireless rather than legacy household interconnect wire.

Maintenance and accessory matching: Test on the schedule required by local code and Google guidance, keep vents clean, use only L91 cells, and replace the complete alarm by its printed expiration date.

Published checkpoints: Generation: second-generation Nest Protect battery version. Power: six Energizer Ultimate Lithium L91 AA cells. Smoke sensing: split-spectrum photoelectric design. Carbon monoxide: electrochemical sensor. Additional sensing: occupancy, ambient light, temperature, and humidity support device features. Wireless: 2.4GHz Wi-Fi for app services. Interconnect: Thread-based wireless alarm interconnect with compatible Nest Protect units. Alarm: voice warnings plus 85dB horn. Self-test: Sound Check and automatic sensor/electronics checks. Lifecycle: entire alarm is replaced ten years after manufacture. Setup: Nest app scans the QR code and tests alarm placement. Reset: hold the Nest button through the spoken countdown; history and network state are cleared.

• Wireless: 2.4GHz Wi-Fi for app services
• Interconnect: Thread-based wireless alarm interconnect with compatible Nest Protect units
• Alarm: voice warnings plus 85dB horn
• Self-test: Sound Check and automatic sensor/electronics checks
• Lifecycle: entire alarm is replaced ten years after manufacture
• Setup: Nest app scans the QR code and tests alarm placement
• Reset: hold the Nest button through the spoken countdown; history and network state are cleared