The battery-powered Nest Protect uses its batteries for ... In our smoke tests, the Kidde alarm called out “Fire!” as it should, and the “hush” button easily shut down cooking-activated ...

So when [Martin] purchased a battery-powered ... expensive Nest protect, when all it takes it a sensor or two and a Raspberry Pi to hack the fire alarm that already sits in the house.

This does not take into account features that require monthly fees. The Google Nest Cam (Battery) is part of the Home Security Cameras test program at Consumer Reports. In our lab tests ...