From a Dezeen.com online article:

…this prototype is powered by a 10.5 amp hour (AH) lithium battery, which can reach speeds of just over 12 miles per hour and power the vehicle for around 12 miles on a single charge.

Hyundai has plans to integrate a regenerative braking system in the future, which would convert waste kinetic energy from the scooter’s brakes into electricity used to power it. The company claims this could increase its range by up to seven per cent.

Hyundai has created a prototype scooter that folds down to the size of a backpack and can be charged in a car using the energy created while driving. The scooter has been designed for use with future Hyundai or Kia models, which would come with designated storage and charging compartments.

To read more: https://www.dezeen.com/2019/09/09/hyundai-scooter-design-foldable-electric-vehicle/