what is the power output on the 3.0 ports on the 3900? can I charge things faster than on the 2.0 ports?
Thanks for posting and I would be happy to answer your question!
The USB 3.0 ports on the UD-3900 provide up to 900 mA of power to devices as is required by the USB 3.0 specification, and there are no special charging capabilities available on the USB ports on the dock. If your device does charge while connected to the dock I would not expect any measurable difference in time compared to the USB 2.0 port.