Issue with Incorrect Voltage Reading from GSM

[Nikitanagar]

I'm encountering an issue with the voltage reading from the VBAT_ADC pin on my GSM module, which is connected to two batteries in parallel. The voltage reading I get is 6499mV, which doesn't reflect the actual battery voltage (around 3.7V). When I use the AT+CBC command, I get the same incorrect reading.

GSM module: A7672S

Is there a known issue with how the GSM module's VBAT_ADC pin handles voltage readings? Could this be related to how the GSM module scales the voltage, or are there settings (such as reference voltage or ADC resolution) that I should adjust?

Any guidance on troubleshooting this or possible solutions would be very helpful!