Topics created by etolocka

@etolocka Well, Ernesto, if the returned value is saying that the battery is 100% of 4.2 volts...I think you are THERE!
I do not use Python, have a board like yours or ever monitored battery voltage, so I am no expert, it looks like you are OK!
-Terry

@etolocka Yes, it does. It's the red component marked C3, which is a compact "ceramic antenna" shown in the upper right image.
https://www.lilygo.cc/en-ca/products/t-oi-plus?variant=42306652111029

refer to the schematic page 1 upper left:
https://github.com/Xinyuan-LilyGO/LilyGo-T-OI-PLUS/blob/main/schematic/T-OI_PLUS_Schematic.pdf

Aliexpess:
https://www.aliexpress.com/i/3256801896137015.html?gatewayAdapt=4itemAdapt