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Roost packs smarts into a familiar 9V form (pictures)

Swap the battery and add connected smarts to your smoke detector with the Roost Smart Battery.

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Andrew Gebhart

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1 of 14 Tyler Lizenby/CNET

It might look like an ordinary battery, but Roost is anything but. Complete with Wi-Fi capability, Roost will send you a notification should your smoke alarm sound. Click through to see how this smart device can add retrofit connectivity to your old smoke detector.

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2 of 14 Tyler Lizenby/CNET

Roost looks just like a 9V battery.

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3 of 14 Tyler Lizenby/CNET

And it installs into your old smoke detector.

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4 of 14 Tyler Lizenby/CNET

Put Roost into your smoke detector and install the app on your phone.

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5 of 14 Screenshots by Andrew Gebhart/CNET

The app will walk you through the rest of the steps to connect the battery to your router.

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6 of 14 Tyler Lizenby/CNET

And you're done. Roost's setup was as easy as any smart device I've ever tested.

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7 of 14 Screenshots by Andrew Gebhart/CNET

Roost's main app page and menus show all is well.

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8 of 14 Screenshots by Ry Crist/CNET

You can easily add additional monitors to Roost, so your family can also receive notifications when an alarm sounds.

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9 of 14 Tyler Lizenby/CNET

The bottom of Roost pulls free, letting you peek at the packed-in tech.

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10 of 14 Tyler Lizenby/CNET

On the back of the battery, you can see a small microphone. Pull off the bottom to see Roost's circuits.

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11 of 14 Tyler Lizenby/CNET

You can also replace Roost's power source when it runs out, though Roost claims its battery can last up to five years.

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12 of 14 Tyler Lizenby/CNET

Once you're up and running, Roost stands guard for smoke.

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13 of 14 Screenshots by Andrew Gebhart/CNET

When an alarm sounds, your phone's notification will sound like a siren. Pull up the app, and you'll be prompted to take action. Roost's emergency contact defaults to 911.

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14 of 14 Tyler Lizenby/CNET

By swapping out the battery, you can make your old smoke detector smart. Thanks to the Roost Smart Battery, you'll be notified of any alert no matter where you are.

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