How does the regenerative braking system work on Audi A2 vehicles?

I've heard about the regenerative braking system on Audi A2 cars, but I'm not sure how it works. Can someone explain it in simple terms?

The regenerative braking system on Audi A2 uses an electromechanical brake booster to convert the kinetic energy of the vehicle's motion into electrical energy, which is then used to recharge the battery.

When you apply the brakes on an Audi A2, the kinetic energy of the car is converted into electrical energy by the regenerative braking system, which is then stored in the battery for later use. This helps improve the overall efficiency of the vehicle.