Stay prepared with the most reliable smoke detectors for fire and carbon monoxide detection -- tested and recommended by our experts.

Best smart The Nest Protect features both a carbon ... If you don't hear anything or the sound seems quiet, it's time to replace the battery or smoke detector. Many insurance companies advise ...

However, for optimal performance, it's important to regularly test and replace the smoke detector 9V battery as needed to ensure reliable operation and uninterrupted protection against fire hazards.

Instead of blaring an alarm at the slightest smoke, the Nest Protect is smart enough ... You also get a text if the battery needs replacement, which is much better than the mystery squeal that ...