The Roost battery is a smoke detector battery that can be used on pre-existing conventional smoke detectors to convert them into 'smart' detectors that communicate with your household WiFi network.
If your alarm goes off, the Roost battery's module will send an alert to your phone via a free iOS or Android app. It can also be programmed to notify family members or neighbors.
The Roost battery is available for pre-order and is expected to be shipped out in September. It costs $35 for one and $65 for a pair. This is a great example of smart home technology being used to give homeowners piece of mind, all by leveraging the wonders of mobile technology and smartphone apps.