If a 680K was erroneously used in place of the 330K then it would all make sense.
Do those smd resistors have markings of some sort? Like 105?
Maybe time for a good picture from the board itself.
Or: a measurement... but if there is any other circuitry on the vbatt label, the measurement may yield false results...
usually but not always
Update @build_1971 @jim-p the battery went empty (3.2V measured via Voltmeter)
The raw adc reading changed from 3375 ( fully charged 4.16V directly on battery) to 3365 (3.2V directly on battery). That does not seem right.
Resistors do not have color indications.
Ref. drawing in post 14: What is the voltage from Vbatt to ground? From top of 1M to ground?
Vbatt to ground is the same as measuring the at the two pins on the battery, or am I wrong? If not, its 4.16V when fully charged and 3.2V when empty.
Cant measure on top of 1M as the board is very small. Can't even identify which resistor this is on the board. I would need some guidance.
The 1M2 resistor is on the underside of the board:
Arrowed below:
Note, that if you connect a standard multimeter (10MΩ input resistance) there will be a loading effect. The equivalent parallel resistance is 1.071MΩ.
0402 size resistors (and smaller) are too small to mark. they are normally plain black.
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