Couple questions on battery use

Products & Technology XIAO
1

Hello all. Is there a way to connect a led to the onboard led to display the battery charge on the outside of a case that I am making? Would like to be able to see the battery charge indicator as the module will not be visible. Can the onboard led be mapped to another GPIO?

Also, is it safe for the charger circuit to hook up 2 18650 5000mAh batteries in parallel? Don’t want to overload the charger. TIA for any help.

2

It is very dangerous to use LiPo batteries connected in parallel.

The on-board red LED on the ESP32S3 only indicates that the battery is charging, not the remaining battery charge.
It is possible to write code to measure the battery voltage and display it’s status on an external LED connected to the GPIO. The battery voltage must be resistor-divided externally and converted to AD.