What is Audi A8's 48V mild-hybrid system?

I've heard that Audi A8 has a 48V mild-hybrid system. Can someone explain what it does and how it's different from a regular hybrid system?

The 48V mild-hybrid system in Audi A8 uses a small electric motor to assist the combustion engine, providing a boost in power and improving fuel efficiency. It also allows the car to coast with the engine off at speeds between 34-99 mph.

This system also allows for smoother start-stop functionality and regenerative braking, reducing wear and tear on the engine. It's also more cost-effective to produce compared to a full hybrid system.

I've been driving an Audi A8 for a year now and I can say that the 48V mild-hybrid system really makes a noticeable difference in terms of performance and fuel efficiency. My advice is to give it a try and see for yourself!