Hi mweal,
I don’t understand your issue. Could you specify what the anomaly with power is? Did you modify the board to power the board from the console USB instead of the OTG?
… the unit will automatically power backup when I plug in the USB power source.
Did you mean when you unplug the USB power source the battery starts working?
Also, keep in mind if you power the board from USB and battery simultaneously you might burn the board.
Regards,
JPMontero_Intel