Xiao nrf52840 Battery

I have a question about the Xiao nRF52840 Sense. I searched the internet on how to connect the battery to the board and bought a LiPo (3.7V 750mAh). I connected it, but the board is not charging. How can I fix this?

Do you mean that there is no voltage on the xiao after connecting the battery? How did you determine that the board was not being charged, can you elaborate?