Just got a new MacBook with USB 3 ports. I thought it would be able to charge my Nexus 4 phone much faster using USB 3 900 mA current.
However, I haven't seen any improvements compared to charging on a USB 2 port. Obviously, AC chargers can charge way over 500 mA using USB 2 cables.
Which brings me to question: can a (micro) USB 2 cable hooked up to a computer USB 3 port charge a device at 900 mA current, or is it limited by the USB 2 cable to 500 mA?