My two cents.
Charging with the wall charger didn't yield any results, even after a week of sitting and charging. Cleaned all contacts with a toothpick and did the same thing, nothing. Tried plugging into my laptop (something that worked for some posters), still nothing.
What finally did the trick was actually picking up a screwdriver and briefly disconnecting the battery from the motherboard, then putting it back together. When I plugged it in afterwards the orange clock icon appeared immediately, and my Gear begun charging. Hooray!
So, if nothing else, I confirm the battery disconnect trick - works like a charm. Don't worry about not having small TORX drivers; a 1.4mm flathead should work fine - be careful though, you may ruin the screws if you use too much force. You've been warned!