XIAO nRF52840 Sense - Using non-chargable battery?

When not using USB power I have been considering where to apply a 3v non-chargable battery to the XIAO nRF52840 Sense.

  • Applying 3v to Vbat appears to be ok but with a small voltage drop through Q1 Fet and U6 the LDO regulator.
  • Appying 3v directly to 3V3 pin on header J1. It would appear that U6 LDO regulator Out pin can handle an applied voltage.
  • I note that there is a label /CE on U2 TS pin. If TS is grounded it would appear to disable the charger IC. I can’t find if /CE is accessible or where else it is connected in the schematic.

Any thoughts and suggestions?

Hi Gordy7,
Would post #7 in the link below be helpful?

XIAO nRF52840 - Recharging 3V 18650 battery?

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