I just bought a RavPower Super-C Series 26800mAh Portable Charge so that I can re-charge my Acer Switch Alpha 12 laptop/tablet while traveling.  I can't seem to get it to work.  My Acer states that it's USB-C port can be used for charging.  I have tried connecting my new RavPower but it won't work.  Perhaps I'm not connecting it properly?  Can anyone please help???  Thanks...