However, it is a mystery to me, is when loaded with (up to) 2A, and when only USB. Seems depends on the cable. When connecting, it is usually up to 2A (shows anyway cell phone - AC), after a while, it then falls back to USB but even with the original USB cable of the mobile phone it is. When long cables supplied it works at full speed.
The little Cables included seems to have a loose contact with me.
The longer works perfectly, however. Hmmn ...