How does the Audi e-Tron achieve maximum regenerative braking efficiency?

I've heard that the e-Tron has impressive regenerative braking capabilities. How does it work and what can I do to maximize efficiency while driving?

To achieve maximum regenerative braking efficiency, the Audi e-Tron uses a combination of its electric motors and hydraulic brakes. The electric motors slow down the car by converting its kinetic energy into electrical energy, which is then stored in the battery. When driving, try to anticipate stops and coast to slow down, rather than aggressively using the brakes.