micro:bit v2 micropython detecting if power is supplied from USB micro port

[burksfamly]

I have researched this topic.

To make sure I have not missed anything, is there any way I can directly or indirectly determine in real-time using micropython whether or not the micro:bit v2 is being powered by the USB micro connection (i.e., not battery).

• it is my understanding that the USB internal interface is NOT exposed to micropython
• if I can't read directly, is there possibly another register I could read that would indirectly indicate USB power only
  (in other words, the only way that this bit would be high is if the micro:bit was on USB power)
• it would be nice if a could monitor the register fir state of the red LED on the back of the micro:bit (the RED LED
  is bright when it is on USB power, dim when on battery power and off when not powered).
• I really, really do not want to do this, but I could tie a light sensor to an analog pin and code and monitor the
  red LED brightness on the back of the micro:bit (it is bright when on USB power and dim when on battery power)

Any thoughts?

Thank You.