Dynamo

A dynamo is a device used to generate electricity.

Technology
Electricity is generated by spinning a coil between the poles of a magnet or electromagnet.

History
There was a dynamo in a rocket assembly plant near New York City. Spider-Man tried to use it to defeat Doctor Octopus except it activated a rocket engine endangering the lives of Felicia Hardy and J. Jonah Jameson. He was then able to defeat the villain with an electromagnet.

A Russian supervillain used armor that generated power and called himself Crimson Dynamo.