Battery charge on XIAO Esp32-C3 not working as expected

[msfujino]

I am measuring the charging current with a 3.7V 2000mAh battery without protection circuit. Starting at 4.1V 370mA, the current gradually decreases and now it is still charging at 110mA. Maybe I am mistaken and the charge controller is not BQ25101 but an IC like MCP73831.
I will post the results.

[EDIT]
see the link bellow

Charging characteristics of XIAO_nRF52840 and XIAO_ESP32C3

XIAO_nRF52840 and XIAO_ESP32C3 have a built-in charging function, but since the circuit diagram was not disclosed, I assumed that they have the same circuit. I was curious and measured the charging characteristics. They are completely different, XIAO_nRF52840’s charging current can be set to 50mA or 100mA by firmware, but XIAO_ESP32C3’s is fixed and very large at 370mA, so I need to be very careful when using small capacity batteries. [XIAO_Charge]