Electrical engineer Nikola Tesla is one of the scientists who made the most important contributions to the development of electrical science and technology in the last 100 years. During his 86 years of life, most of them as a resident of the USA, he dedicates them to subjects as diverse as electricity and electromagnetism, among others, anticipating in several decades to the physics of his time. He is considered the father of alternating current, with patents granted, some of them after his death. His life is fascinating, not only because of his inventions, but also because of the stories and tales that surround him. He stars in the famous period known as the Battle of the Currents, whose opponent was the renowned Thomas Alva Edison, an environment that has served as a script for various documentaries and films. The purpose of this work is to describe part of its history and, especially, of this famous period. We hope that readers will find the life and work of this character as fascinating as many of us are in appreciating the invaluable legacy of his technological developments.