Yes, that is what i want to do. Power the board by 5v constant converter while reading the voltage directly from battery terminal.
For now my lipo 3.7v is connected to TP4056 charger, and came out from it then connect to board, does is diatrupt anything? My voltmeter reads both in and out from TP4056 is the same voltage, so i assume no problem attach it right?
By saying my old code will work, and by looking at the library...it can read voltagr from A0 pin right?