yea I have the A-300:

http://www.aliexpress.com/store/product/Cool-style-USB-2-0-HUB-Charger-10-ports-with-CE-ROHS-FCC-certification/1938705_32513481030.html

looks according to the specs only 600mA per port...sucks.

I would still like to know if there is a way in general to test the max Amp per port on a US hub manually?
Thanks!