I have had good luck with this charger. Works well on the 360 and my nexus 6. I keep it in my backpack for work and travel, and it's been solid. A little finicky with the positioning on my nexus 6, but fine with the 360.

I keep an AuKey puck in my backpack for my phone and 360. It was like $12 on sale at Amazon. It's a little picky with my nexus 6 on placement since it's only a single coil, but I've had no problems with the watch.