SLUUB41A May 2014 – October 2021 BQ76920 , BQ76930 , BQ76940
The BAT_HI and BAT_LO registers are not directly from the ADC. The cell voltages are summed and the result (divided by 4) is stored in the registers. To get the battery voltage, concatenate the register values and multiply by 4, multiply by the gain, and add the offset multiplied by the number of cells. The equation is shown in the data sheet.