LILYGO TTGO T5 V2.3 2.13 Inch E-Paper Display - How to get battery readings?

Im using the LILYGO TTGO T5 V2.3 2.13 Inch E-Paper display in my first HA project and I learned a lot from experimenting and altering this repo: https://github.com/kotope/esphome_eink_dashboard

Is there a way to read the battery level of the 2.13" display like it is done with the 4.7" display in the linked repo? I can see that there is a battery component for that one but it doesn’t seem to work for my display.