........the just-released Moto 360, has a round Gorilla Glass screen that runs on Android Wear. Its features are far more robust than your average fitness tracker, and the display is a remarkable feat of creativity. But while The Verge's David Pierce gave the 360 a glowing review, among its major weaknesses is battery life, which lasts less than a day on a single charge.
Less than a day! Now, part of the problem is structural. In vastly oversimplified terms, big batteries provide more power; smaller ones do not. Watches are, by design, no bigger than your wrist, which is why they have done little more than tell time up to this point. They are and always have been an accessory, not a necessity.
hmmmmmmmmm...................
http://www.fastcompany.com/3035409/internet-of-things/this-is-the-single-most-important-feature-that-could-break-apples-iwatch