So does anyone have a link to a good usb charger that can charge the HI12 at 3+amps?
I got one of these and find it is very good. You need to use the supplied cable for best performance.
ORICO QTW-1U 1 Port Travel Wall Charger With Qualcomm Quick Charge 3.0 with 1m Free Micro USB Cable
http://s.aliexpress.com/aUfyuaqI
(from AliExpress Android)
I calculate actual charging is about 2.2 Amps powered off so can do a full charge in about 5 to 6 hours. When running 1 to 1.5 amps depending on brightness as rest of current going to run tablet.