I tested the usb-c. It seems that it doesn't work. I tested with a 12.000 mAh usb power bank, with the usb-c but it doesn't work. So I've bought the inspire 1 power supply (....) and with this one the battery has charged....another question will the battery to USB adaptor not work to charge the crystal sky via usb C?
I think dji is not serious but for now can do what he wants.