Im having the exact same problem, my gear 2 is not charging anymore, a few weeks prior to not charging, I was feeling a little rash when I was using my gear 2, i took it off and saw I had 2 little red spots in my wrist, i looked at the back of the watch and 2 of the charging pins were corroded , few weeks later one of the charging pins is gone, and my watch is not charging at all, still under warranty, any chance samsung will honor this, i have heard stories about them saying is physical damage, this is clearly a manufacturing defect, because a lot of people are getting this problem.