I noticed that plugging my Samsung Galaxy Nexus phone into the USB port that it does not seem to charge much, if at all and in fact may be losing charge. Has anyone else experienced issues charging via the USB ports? I'm guessing that the USB ports don't put out all that much current, though it's enough to drive a USB-powered 1.8" hard drive. I'd prefer to not have to use my 2A aux port USB adapter if possible.