I’m using a PicoCalc with a Pico 2W running WebMite 6.00.03.
I just updated the keyboard BIOS to the official 1.4 version recently, but I don’t know if that has anything to do with the problem.
Here’s the problem:
The green power LED doesn’t stay on when the calculator is on. It comes on when I connect the USB 3.0 but then goes off after a few seconds.
Does anyone else have this problem?
I find this funny, that in another thread I am trying to get the Green Power LED to turn off but it stays on. 
As the green LED is driven by the STM32, the battery has been detected as low (<20%) and the firmware cut off the green led.
But this check/toggle occurs only at the start and every 20s after. This may partly explain why it turns on and off after being plugged in.