2 great ideas:
1) if the cover has his own usb port, then maybe you can keep it plugged in and clip the Oasis in the cover to charge. Might be easier than putting a usb cable in the device itself.
2) How long until 3rd party cases for the Voyage show up that have an extra wedge on one side, extend the edge to make the side with the wedge longer, stuff a battery in the wedge for slightly extra weight in the wedge and include a short usb cable so the battery in wedge can plug in to the Voyage. Rinse and repeat for the PW.
