CubeCell Module + Custom PCB + Read battery voltage

Hi again,

sorry for spamming, but i need your advice again.

I need to read the battery voltage on my custom pcb and i found two circuits on the Heltec site.

This is how i did it in my own pcb. The result i get is 2.25V. The battery itself has ~3.6V

This is a second version i found

i woundering about the voltage devider, they are different.
I assume it has to be like in the second circuit?

Replaced the 220k resistor by an another 100k resistor, now i’m getting 3.6V.
Doing some math in my sketch instead, would got me the same result…
Anyway, it works now :slight_smile:

1 Like