How does the Audi e-Tron's energy recuperation system work?

I've heard about the Audi e-Tron's advanced energy recuperation system, but I'm not sure how it actually works. Can you explain the mechanics behind it and how it helps improve the car's efficiency?

The Audi e-Tron uses a two-stage recuperation system, which means it can recover energy both during deceleration and braking. This system captures kinetic energy that would otherwise be lost and uses it to recharge the battery, reducing the need for external charging.

To put it simply, the e-Tron uses regenerative braking to convert the kinetic energy of the car into electricity, just like a hybrid vehicle. This energy is then stored in the battery for later use, reducing the car's overall energy consumption.

One unique feature of the e-Tron's recuperation system is its ability to adjust the level of regenerative braking based on the driving situation. For example, when driving downhill, the car will increase regenerative braking to slow down and capture more energy.