ahh, my bad. When the GZ website indicated 9200 mAh it also stated at 1.2 volts
Quote:
...Single Cell Equivalent Capacity: 9200mAh at 1.2V...
which would be different than the 6000 mAh at the Mophie's unspecified voltage, but it's safe to assume it's higher than 1.2 volts.