Once converted to digital form, each cell voltage is added up and the summation result stored in the BAT registers. The sum is divided by 4 so that the result of summing 15 cells fits in the 16-bit value. This 16-bit value has a nominal LSB of 1.532 mV.

The following shows how to convert the 16-bit pack voltage ADC reading into an analog voltage. This value also uses the GAIN and OFFSET stored into EEPROM.

The ADC transfer function is a linear equation defined as follows:

GAIN is stored in units of µV/LSB, while OFFSET is stored in mV units.