Connect an external 3.3V power supply to the 3V and GND pins. Not recommended, this may cause unexpected
behavior and the EN pin will no longer. Also this doesn't provide power on BAT or USB and some
Feathers/Wings use those pins for high current usages. You may end up damaging your Feather.
Connect an external 5V power supply to the USB and GND pins. Not recommended, this may cause unexpected
behavior when plugging in the USB port because you will be back-powering the USB port, which
could
confuse
or damage your computer.
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