Does the Audi a5 have a charging port in the back seat?

No. The Audi A5 backseat area does not come with a separate charging port. However, the Audi A5's backseat area is usually supplied with a 12V power outlet, also known as a cigarette lighter outlet. By using an adapter or charger adapter cable, you can use the cigarette lighter socket for charging devices such as cell phones and tablets.