Roost PP3 (9v) Specialty Battery
Last updated: April 6, 2019
We looked at the top Carbon Monoxide Detectors and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Carbon Monoxide Detector you should buy.
Expert Reviews
What reviewers liked
This 9-volt smart battery is not a smoke alarm itself, but thanks to its built-in microphone and Wi-Fi chip, it can turn any smoke alarm powered by a 9-volt battery or hardwired with a 9-volt backup into a smart one.
Roost's Smart Battery offers a cost-effective compromise. This $35 device plugs into most any smoke detector. Not only will it alert you when the alarm sounds, but it will also let you silence the noise, temporarily, from your smartphone.
The Roost will also send alerts to you—and to as many additional people as you can recruit to be in your Home Circle—when the accumulation of smoke or carbon monoxide triggers the detector it’s installed in (those folks will need to accept your invitation and install the Roost app on their own smartphone).
- TechHive
The notification on your phone even sounds like an alarm. It's loud, annoying, and perfect, as it clearly distinguishes its own alert from an ordinary text or email alert.
What reviewers didn't like
Its biggest flaw is a lack of wireless interconnectivity between battery-powered alarms. If one alarm loaded with a Roost battery sounds, it will bleep away sadly on its own until the danger spreads in the direction of the other alarms, but you will get an alert on your phone.
Roost's integration with other smart home systems is fairly limited. You can connect it to other devices only via IFTTT
Roost offers the option to "snooze" your alarm, but that won't work if your alarm is hardwired and the 9V is acting as a backup.
View our Carbon Monoxide Detector buying guide for in-depth advice and recommendations.