A New Bluetooth Standard Lets Devices Communicate Without Draining Power | Popular Science.
As more of us pair earsets and watches and speaker systems to phones and computers wirelessly, we know little or nothing about the science of what it is that makes it work. This PopSci feature will tell you all you need to know in one page. I am most interested in the evolution of BlueTooth to version 4.0, which will eliminate the need to charge my devices every evening. It contains circuitry that keeps the radio off unless data is being transmitted to or from the device. So, a smartwatch is coming that will run for up to a year without charging. My Sony Smartwatch sometimes dies in the afternoon if I am using it a lot. The standard is named after a Danish King who united warring factions in Scandanavia in the 10th century. Somehow, I don't think the King would understand that he now describes a method for joining two computer devices. The little blue symbol is the Rune Initials of King Harald Blatand. Now that you know that, I expect you to impress your friends.