Did Ancient People Use the “Baghdad Battery” to Harness Electricitiy?

By Dig Labs Contributors

Source: Dig Labs Project

Was the Baghdad Battery a medical device, a religious artifact, or the first known battery? Could it be part of a larger, more complex system lost to history?

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Note to reader:
We hope you find this article useful—it’s an ongoing Observatory research project that will be updated.
If you have expertise or insight on the topic that you think could be useful, please send us a note.

Join Our Collaborative Research

Dig Labs Collaborative ResearchHelp us investigate these questions further. Review the current state of research surrounding this topic, suggest new sources, or share your expertise. Every contribution helps.

“Did Ancient People Use the “Baghdad Battery” to Harness Electricitiy?” by Dig Labs Contributors is licensed by the Observatory under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0). For permissions requests beyond the scope of this license, please see Observatory.wiki’s Reuse and Reprint Rights guidance.Last edited: July 9, 2026

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Introduction

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The Baghdad Battery is believed to date back to 250 BC, comprising of a clay jar, a copper cylinder, and an iron rod arranged to produce a small electric current when filled with an acidic substance. Despite being a simple device, its true purpose remains shrouded in mystery.

Scholars have put forth various theories over the years, suggesting that the device was used for electroplating, as a medical instrument, or for religious ceremonies. Was the Baghdad Battery a medical device, a religious artifact, the first known instance of a battery? Could it be part of a larger, more complex system lost to history?