LilyGO® T-Beam Supreme Core module power

Hi, not really a code development, but more hardware related question.
Is it possible to run the actual T3-S3 Core module (the one that clips on to Expansion board) from a 3.7V battery?
I am currently running it of the USB-C power and it is self sufficient tiny board.
I see in LiliyGo schematics main molex connector has V-BAT on pin 9-11.

I have tried feeding 3.7V but the board doesn’t start up.

image
The intention is to build a very small Meshtastic node with GPS and internal Lora antenna packed into a small case.