USB power source to 12-volt input from JST PH2.0-4Pin connector

Hi,

I see the Lattepanda 3 delta can be powered both via USB-C and the 12-volt JST PH2.0-4Pin connector.

Right now I have a powerbank capable of powering the lattepanda via USB-C. 

I was wondering if anyone could point me to an USB to 4pin connector adapter so that when I have the Lattepanda connected to the wall outlet power adapter, I can connect the powerbank on the 4pin and disconnect the usbc wall outlet without turning it off