My Dell Monitor (U2715H) has a USB charging port - "Quickly charge BC1.2 compatible and other USB devices with a USB 3.01 port found on the rear of the monitor that supplies high-speed charging and powering." I couldn't find coherent specs on what kind of charge this provided. Is it possible to charge a new 15" MacBook Pro from this port? Wishful thinking? I'm hoping to use my existing monitor as a desktop hub with as few cables as possible.