XIAO_BLE_Sense(mbed 2.7.2) battery charge and voltage monitor, analogRead(P0_31) does not work

Products & Technology XIAO
49

Data when the battery is not connected. It looks a little different from your data.
Do you think it could be due to the battery? Have you tried replacing the battery?

PIN_VBAT=4137  P0_31=4186
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4137  P0_31=4176
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4118  P0_31=4186
PIN_VBAT=4137  P0_31=4166
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4137  P0_31=4176
PIN_VBAT=4137  P0_31=4157
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4137  P0_31=4176
PIN_VBAT=4147  P0_31=4176
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3741  P0_31=3789
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3741  P0_31=3780
PIN_VBAT=3751  P0_31=3780
PIN_VBAT=3751  P0_31=3780
PIN_VBAT=3751  P0_31=3770
PIN_VBAT=3722  P0_31=3780
PIN_VBAT=3741  P0_31=3789
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3741  P0_31=3780
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3722  P0_31=3780
PIN_VBAT=3741  P0_31=3780
PIN_VBAT=3722  P0_31=3770
PIN_VBAT=3741  P0_31=3780
PIN_VBAT=3741  P0_31=3770
PIN_VBAT=3731  P0_31=3770
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=4128  P0_31=3722
PIN_VBAT=4137  P0_31=4186
PIN_VBAT=4137  P0_31=4176
PIN_VBAT=4118  P0_31=4186
PIN_VBAT=4118  P0_31=4186
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4137  P0_31=4176
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4137  P0_31=4176
PIN_VBAT=4137  P0_31=4176
PIN_VBAT=4118  P0_31=4166
PIN_VBAT=4118  P0_31=4176
PIN_VBAT=4137  P0_31=4186
PIN_VBAT=4118  P0_31=4176
PIN_VBAT=4128  P0_31=4166
PIN_VBAT=4128  P0_31=4176
PIN_VBAT=4137  P0_31=4176
PIN_VBAT=3731  P0_31=3760
PIN_VBAT=3722  P0_31=3789
PIN_VBAT=3741  P0_31=3780
PIN_VBAT=3741  P0_31=3770
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3751  P0_31=3760
PIN_VBAT=3741  P0_31=3780
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3741  P0_31=3770
PIN_VBAT=3751  P0_31=3780
PIN_VBAT=3731  P0_31=3780
PIN_VBAT=3741  P0_31=3760
PIN_VBAT=3741  P0_31=3780
PIN_VBAT=3741  P0_31=3780
PIN_VBAT=3741  P0_31=3770
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