> The Wi-Fi radio runs on extremely low power by transmitting data via a technique called backscattering. It takes incoming Wi-Fi signals from a nearby device (like a smartphone) or Wi-Fi access point, modifies the signals and encodes its own data onto them, and then reflects the new signals onto a different Wi-Fi channel to another device or access point.
It sounds like the device doesn’t actually transmit its own signals, which I believe is what typically requires the most power.
However, I get the feeling from this press release that while the WiFi chip uses less power, this does nothing to reduce the power requirements of the processing chip that is actually using the WiFi chip to communicate. In the article they use a camera as an example in the diagram. Even though the WiFi component might require less juice, you’re still going to need a hefty power supply to power the camera.