Oh and another thing, I bought myself a mini powerd usb-hub that runs on 5V from the AC adapter, but instead I'm running it of 4 R6 (AA) batteries hooked up in series -> 1.2V x 4 (nimh battries) = 4.8V and that's close enough, it works great so now I'm mobile.
Just remember to use nimh rechargable batteris, regular one have an higher voltage (1.5V) and might fry your equipment.