All I had the same problem. My watch, while in the charging cradle, would show a green light or 90%+ charged. I'd then take it off the cradle and the phone would immediately power down. Whenever I attempted to power it up, I'd see the 'rebooting' message then the phone would power down. I then left in the cradle, turn it on, and walked through the factory reset steps. Great, got that done, but the watch would still immediately turn off the second I'd take it off the charging cradle. I'm beyond the point of returning it and didn't get the insurance when I purchased the watch. I looked all over the place to find a place that would replace the battery, no dice. So now I'm stuck with an expensive paper weight. Then I stumbled across this youtube video: https://www.youtube.com/watch?v=eQfb52LQpPA. Ordered the battery and tools from everyone's favorite online retail store. Three days later, I have my tools and the battery. Followed the steps on the video and bamm!! I have a working watch again.
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