usb - How can I make my Android phone request (negotiate for) more charge from (with) the host PC?

Hello there is a wonderful Q&A here about detecting how much charge your phone is drawing from the computer host: How do you check how much power a USB port can deliver?

In my particular case, my Galaxy S2 was drawing 96mA but my port could offer 500mA. I was wondering as a next step, how I can tell my phone to request from the host PC the ability to draw more than 100mA (500mA if possible) so that it can charge faster. Is there an app or Android setting I could use to make my phone ask for more power?

Thank you very much in advance!