V3 not showing correct voltage

[Oragreen-birdie]

Voltage on Faketec V3 board is not showing correct values. I set ADC multiplier to show correct value but then after some time values drift (ussualy it gets biggers) altough the voltage on battery stays the same. I have a 3000mAh li-po.
TIA

[wmylionel]

I usually use a bench power supply and set it at 4.0v, then start to calibrate the ADC mulitplier. I find it takes awhile for the voltage to settle, maybe some noise reduction formula in the firmware. So let it run a few minutes after changing the multiplier to confirm the voltage reading. Usually i'm around 2.04 ADC with the 10MΩ:10MΩ bridge for the voltage divider.

[Oragreen-birdie]

I've installed 680ohm instead of 680k ohm resistor in the voltage divider. Now it works fine.

[walldodge]

I've installed 680ohm instead of 680k ohm resistor in the voltage divider. Now it works fine.

I believe with such small resistance you are significantly increasing the node power consumption. Also the node will discharge if battery isn't wired trough the switch.