Making Arcade by Microsoft

Wearable game console, should also work with new BrainPad Arcade if the form factor of the console is the same or near to BrainPad2. I am saying that JST connection port is not necessary on the board unless there is something in electrical eng. about this that I am not aware. Please tell me if 5volt to power the board via MicroUSB is not a good idea? Microsoft build guide suggests JST for off board power; I cannot see why. The included USB-MicroUSB cable with this battery pack is DATA/POWER too, what’s not to like at $5.88 ? Shape of power pack is flat, perfect for mounting board on with Velcro:

Yes you can use any power bank to run your BrainPad.