Battery, Baghdad, 250 BCE. The Baghdad Battery is believed to be about 2000 years old (from the Parthian period, roughly 250 BCE to CE 250). The jar was found in Khujut Rabu just outside Baghdad, and is composed of a clay jar with a stopper made of asphalt. Sticking through the asphalt is an iron rod surrounded by a copper cylinder. When filled with vinegar - or any other electrolytic solution - the jar produces about 1.1 volts.
World Mysteries - Strange Artifacts, Baghdad Battery This interpretation is far from having widespread acceptance, but continues to be considered as at least a hypothetical possibility by some scientists
The “Dendera light” is a technology of electrical lighting supposedly in existence in ancient Egypt, proposed by some fringe authors. Description from gnosis.us.com. I searched for this on bing.com/images