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That said, based on their own research, Doug Mahoney calls the SA511CN2 3ST the best basic smoke alarm. The feedback on the SA511B is even better, albeit more limited: 4. 7 stars at Amazon, 4. 6 stars at Home Depot, but that's only based on around 20 reviews across the two sites. The First Alert SA521CN 3ST Est. $40 is a hardwired version of the battery operated First Alert SA511CN2 3ST/SA511B interconnectable smoke detector.

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""What I personally like is the ability to know exactly where smoke would be coming from. If I were to be on the fourth floor in the middle of the night, it would say 'there is smoke in the living room'," wrote one reviewer. 99 View at eBayCheck WalmartCheck Amazon?The Roost battery is the best — well, only — option for those who already have smoke detectors, and want to make them “smart. ” That’s because the Roost battery, which is Wi Fi enabled, sends an alert to your smartphone when the siren goes off. The second generation battery looks and acts like the original, but has a much easier setup process. Through the app, which can accommodate a large number of connected batteries, you have the option to silence the alarm for up to 2 minutes, and automatically send an alert to someone else. Additionally, you can link the Roost battery to other smart home products through IFTTT, to, say, turn on your lights when the alarm goes off. The battery is designed to last up to five years, and will work with any smoke/CO alarms that use a 9 volt battery, which includes hard wired alarms with a 9V battery backup. Roost has updated its app so that users can get notified when there is a severe weather alert, such as hail, freezing temperatures, heavy rainfall and snow, and storms and high winds. What Owners Are SayingThe original Roost Battery has only about 200 reviews on Amazon, where it gets an average of 3 stars. Among the top comments, several praised Roost’s customer service in troubleshooting issues.

 

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49. 5/59. 58. 69. 29. 292PASSVisible LED480 x 640120$024 Hours95AugustAlexa, Nest, IFTTT, Google Home, Honeywell901 YearRequiredTemporary BackupWi Fi; BluetoothNest HelloView Deal4. 5/59. 39. 19. 78. 595PASSIR LEDs1600 x 1200160$55 Days92Nest x YaleNest, IFTTT, Google Home882 YearsRequiredWi Fi; Bluetooth; ThreadRing Video Doorbell ProView Deal4.