The battery life can be up to 80km but varies depending on a number of factors:
* the level of assistance
* the difference in altitude,
* the type of road used
* the regularity of braking and acceleration
* the weather (temperature, wind, etc.)
* your weight...
A 70kg person, riding on a flat road, without stopping, with an assistance level of 50% will be able to ride for 70km. In the city and by varying the level of assistance on a road with a few climbs, the same person will benefit from about 50km of autonomy.