XIAO ESP32C3 power supply after battery charging

Products & Technology Arduino & Seeeduino
#1

When the board is plugged to USB and the battery is fully charged, the LED on the board turns off and the MCU is still running.
In this situation, what is the power source of the MCU, the USB, or the battery?
(I measured the current and it seems that there’s some current going from the USB port, so I think the USB port is but not sure.)

Thank you.

#2

Hi, the LED on this product is a charging light and only comes on when the battery is charging, you can find that it also does not come on when you only connect the lithium battery to the BAT±.
Priority is given to powering from the usb when it is plugged in.