The 100W USB-C GaN charger can help you out in a pinch, and it can currently be yours for only $59.99 (reg. $119). This tiny but mighty power solution is less than the length of a credit card ...

[delokaver] figured out how to use these 3G cards over USB instead. It’s actually a fairly straightforward hack. The Mini PCI-e standard has a couple of pins dedicated to USB data lines ...