VADC cal (driver refs this boot): 96.272 uV/code at ADC input; VBAT = 3 x (625000 + (raw-31246) x k)
 n  raw6   VBAT_vadc  raw7   VPH(raw) VPH(drv)  FIFO_newest
 1  37751  3.7538    37741  3.7509  3.7488  13134
 2  37750  3.7535    37720  3.7448  3.7598  13134
 3  37754  3.7546    37777  3.7613  3.7538  13183
 4  37724  3.7460    37744  3.7517  3.7532  13190
 5  37688  3.7356    37746  3.7523  3.7514  13190
 6  37758  3.7558    37758  3.7558  3.7561  13190
 7  37749  3.7532    37734  3.7488  3.7324  13190
 8  37755  3.7549    37695  3.7376  3.7546  13195
 9  37690  3.7361    37753  3.7543  3.7546  13195
10  37755  3.7549    37756  3.7552  3.7543  13195
11  37761  3.7566    37755  3.7549  3.7555  13195
12  37752  3.7540    37752  3.7540  3.7532  13195
VBAT_vadc mean 3.7507 V  stdev 7.4 mV  min 3.7356 max 3.7566
VPH drv   mean 3.7523 V  stdev 6.8 mV
DMM (operator, VBAT pad vs GND, 10 mV resolution, 10 readings): mean 3.7190  stdev 20.2 mV  range 3.70-3.74
VADC - DMM = +31.7 mV (+0.85 %)
BMS FIFO newest (last 6): mean 13194.2
FIFO coeff vs VADC: 284.34 uV/LSB ; vs DMM: 281.87 uV/LSB  (upstream assumes 300; uncalibrated downstream 292.97)