What is a regen system and how does it work in the Audi e-Tron?

I'm curious about the regen system in the Audi e-Tron and how it differs from traditional braking systems in gasoline cars. Can someone explain how it works and what its benefits are?

The regen system in the Audi e-Tron captures the kinetic energy produced during braking and stores it in the car's battery. This not only helps to reduce wear on traditional brake pads but also allows for extended driving range as the car is recharging itself while braking.

The regen system in the Audi e-Tron can be adjusted using the car's driving modes. In the most aggressive setting, the car will slow down significantly when the accelerator pedal is released, mimicking traditional engine braking. In the least aggressive setting, the car will coast more for a smoother driving experience.