How does the Baghdad battery work with grape juice?

The Baghdad Battery, an ancient artifact often thought to be a form of galvanic cell, may have worked using Grape Juice as an electrolyte. When a metal rod, such as copper, is placed inside a clay jar containing grape juice, the acidic properties of the juice can facilitate an electrochemical reaction between the copper and the iron used as an anode. This reaction generates a small electric current, which could have been used for electroplating or other applications. However, its exact purpose and functionality remain subjects of debate among historians and archaeologists.