In 1938, a German archaeologist named Wilhelm König was cataloguing artifacts in the National Museum of Iraq when he came across a strange little clay jar, roughly five inches tall, dating to somewhere between 250 BC and 250 AD. Inside was a copper cylinder, and inside that, an iron rod, all sealed with asphalt. König had a background in electroplating, and what he saw looked eerily familiar — a design that, if filled with an acidic liquid like vinegar or wine, would function as a simple galvanic cell. A battery. Nearly two thousand years before Alessandro Volta is credited with inventing one.
The claim exploded into popular imagination, and it’s easy to see why. Replicas built to the same specifications by later researchers, including a MythBusters test in 2003, have genuinely produced a small electric charge — around a volt, enough to give a mild tingle or plate a thin layer of metal onto another object. That’s not nothing. The question that has divided historians ever since is what, if anything, the ancient Parthians actually used that charge for.
Electricity in the Ancient World?
The mainstream position is cautious skepticism: most Egyptologists and historians of science argue the jars were probably used for something mundane, like storing sacred scrolls, with the metal components serving a ritual or structural purpose rather than a genuinely intentional electrical one. There is no accompanying wiring, no bulbs, no clear ancient text describing electrical use, and the “battery” theory wasn’t proposed until a 20th-century engineer looked at it through a 20th-century lens.
But some researchers believe that’s too quick a dismissal. Fringe historians and ancient-technology writers argue the Baghdad Battery may be physical evidence of a broader, largely lost tradition of applied electrical knowledge in the ancient Near East — possibly used for electroplating gold onto jewelry, for mild therapeutic shocks in early medicine, or, in the more paranormal-leaning theories, for something closer to ritual and priestcraft. Ancient temples across Egypt and Mesopotamia are dotted with reliefs some researchers interpret as depicting glowing tube-like objects — most famously the Dendera reliefs in Egypt — which ancient-astronaut proponents connect directly to devices like the Baghdad jars, arguing both are remnants of an electrical technology gifted or taught by outside visitors, then largely forgotten as dynasties and empires collapsed and knowledge was lost.
Legend among some occult and esoteric writers goes further still, suggesting the jars weren’t just electrical curiosities but tools used by priests to produce controlled shocks during initiation rites — a jolt meant to simulate or induce a mystical, otherworldly experience, blurring the line between primitive science and religious theater. Whether or not that’s true, the psychological effect of an unexplained shock, delivered in a dim temple by a robed priest, would have been extraordinary for anyone who had never encountered electricity before.
The original jars have been missing from Baghdad’s museum since the chaos of the 2003 Iraq War, adding a final layer of mystery to an object that was already one of archaeology’s strangest outliers. Real electrochemistry, sealed inside a two-thousand-year-old clay jar, built by people we’re told didn’t know what electricity was — the Baghdad Battery remains a small, quiet reminder that the ancient world may have understood more than the history books give it credit for.