[Q] Android Tablet: Enable Fast Charge/Force AC Charge allways topic

I need to enable fast charge/AC on USB and keep it enable to communicate via USB. I need my tablet to charge as connected to AC and be able to transfer files in the same way as if I connect to a PC.

I will have a AC adapter in the middle powering the device 5V/2A, so I wont burn my PC USB port (I wont drain any power from the PC, just the D+/D-/GND Lines...). I know that I should not connect the tablet directly to a PC once I do this.

I have my device rooted, but I do not want to use a custom kernel. Is there anything I can change on my kernel to do this?

Once I think I saw some change that I must do in a system file to be able to do this, but I'm unable to find it now...

Thanks for any tip,

JS