Why does the Audi A4 use a 48-volt mild hybrid system?

I've noticed that some newer Audi A4 models come equipped with a 48-volt mild hybrid system. What is the purpose of this system and how does it differ from a traditional gas-powered car?

The 48-volt mild hybrid system in the Audi A4 is designed to improve fuel efficiency and reduce emissions. It works by capturing energy from braking and coasting and storing it in a small battery, which can then be used to assist the engine during acceleration. This helps to reduce the workload on the engine and improve overall efficiency.

In addition to improving fuel efficiency, the 48-volt mild hybrid system in the Audi A4 also enhances performance. It provides an electric boost when accelerating, resulting in quicker and smoother acceleration. This technology is especially useful in stop-and-go traffic.

The 48-volt mild hybrid system in the Audi A4 is also responsible for powering the car's start-stop function. This feature shuts off the engine when the car is stopped, such as at a stop light, and then seamlessly restarts it when the brake pedal is released. This not only saves fuel but also reduces emissions.