The range will vary depending on conditions such as rider weight, terrain, incline, etc. Battery range below or above this level is normal and not cause for concern. In ideal conditions:
Super73 Z1: 15-20 miles
Super73 S: 20-25 miles
Super73-S1: 35-40 miles
Super73 Original 2016/2018: 25-27 miles
Super72-S2 and R-Series: An estimated 40+ miles of range at 20mph under throttle only operation and an estimated 75+ miles of range using ECO pedal assist mode.