I've been looking all over the internet.. so it might not exist.. But does anyone have any suggestions for some portable speakers that can be set up to also charge the phone while playing music? I know I can plug in speakers to the 3.5mm jack, and then plug in the phone and the speakers.. but I'm hoping to find something where I can just plug in the speakers, and maybe plug in the phone via the USB cable into the speakers and charge at the same time. For my work, I have to occasionally move my music from room to room.. 1 less cable will help out a bunch. Thanks in advance.