I find the tale of the Baghdad Battery fascinating and comes under the realm of this topic.
'Official' history tells us that the first battery was invented in 1799 by a chap named Alessandro Volta. It consisted of discs of two different metals, such as copper and zinc, separated by cardboard soaked in brine. His battery was given by Volta to Michael Faraday when he and Humphry Davy visited Milan in June 1814. Davy was inspired by Volta's ideas and built his own batteries to experiment with. He created the process now called electrolysis and made several important discoveries. Faraday followed up on this work and went on to alter Davy's ideas about the relationship between electricity and chemistry.
'Alternative' history tells us that this may not be so and actually, the first battery may have been invented 2000 years ago (there are some that may even date back by 4000 years). It was in 1938, while working in Khujut Rabu just outside Baghdad in modern-day Iraq, that German archaeologist Wilhelm Konig unearthed a five-inch-long (13 cm) clay jar containing a copper cylinder that encased an iron rod. The vessel showed signs of corrosion, and early tests revealed that an acidic agent, such as vinegar or wine had been present. It was hypothesized, based on the various components, that it was a type of battery possibly used in electroplating metals. Since then, a number of other similar items have been discovered across the globe, as well as resembling pictations in ancient Egyptian hieroglyphics.
Scientists argued that they could not be batteries, as humans at that time could not have had the knowledge to do so, and that they were very unlikely to produce any charge and, as such, came up with an alternative idea on what they were used for.
However, in 2005 the Mythbusters team proved this claim wrong and demonstrated how the Baghdad Battery could not only produce electricity using wine but also produce larger voltages if a number of them were joined together. This experiment has been repeated by others who have all had the same results:
History is not what scientists say it is. History is more diverse than we imagine and there are things from our historical past which continue to perplex us now, and potentially, will do for years to come.