I have 6 mobile devices that I want to sync with my desktop and charge at the same time. All have USB interfaces. I bought one powered 6 port usb hub and discovered that it does not have enough power to charge more than two of the devices. I do not want to have to buy several usb ports to get this job done and then have to deal with all of the extra cables as well. Is there some way to buy one or two hubs that will allow me to to sync and charge at the same time with the same usb cable?