I've had my watch since launch day and have not had any problems so far. I normally charge it overnight and after 18 hours I usually have 30-40% battery life left. Today at about 2pm I noticed it had 15% left, then 15 min later it asked me to go into power reserve mode. So I did, and it just showed the time in green. Then 30 minutes later it was dead. When I got home from work I charged it to 50% and could not get it to unlock using my iPhone since. I've restarted the watch, turned Bluetooth on and off on my phone, checked to see if I had a new app on the watch that I didn't know about (I didn't) and it still isn't unlocking and the battery is draining much faster than usual. Anyone have any ideas on why this happened and what I should do? Thanks!