I just received my PowerBot charging pad, and QiStone+ wireless power bank.
http://www.amazon.com/PowerBot®-PB1...=UTF8&qid=1419823669&sr=8-1&keywords=powerbot
http://www.amazon.com/QiStone-Completely-Compatible-Including-Receivers/dp/B00KOOE5SK/ref=sr_1_2?ie=UTF8&qid=1419823748&sr=8-2&keywords=qistone
I bought the PowerBot to charge the QiStone, and the QiStone to primarily charge the watch on the go, although it'll be handy to top up my Nexii when I'm away from an outlet as well.
I'm doing a test charge right now. With the QiStone+ fully charged, I began charging my watch a few minutes ago. It's charging just as fast, if not faster, than the OEM Qi dock. It looks like the watch's charge current drops low enough, however, that the QiStone stops charging at ~76% and turns off. To rule out a problem with the QiStone, I just dropped the N6 on it and it started charging away.
The PowerBot seems to be less tempermental; I dropped the watch on it at 76% and it began charging again.
More testing is in order...
I did some further tests with the PowerBot and a USB power meter. With the Moto 360 on the PowerBot, the charger pulls ~500mA/h. With the QiStone+ on the PowerBot, 1A current is pulled. The Nexus 6 on the PowerBot pulled a whopping 1.5A/h charge current.
The PowerBot is rated at 1.5A maximum input current, and the power brick used in the test is rated at 1.35A max (the charger for my Nexus 7), so I don't know if the charge current measured while charging the N6 was a limitation of the PowerBot or the charger brick.
More tinkering required...