How to store energy with permanent magnet mechanism

At its core, SMES uses superconducting coils cooled to extremely low temperatures. When electricity flows through these coils, it creates a powerful magnetic field. With the recent advances in emerging technologies such as the internet of things, wire-less sensor networks and wearable devices; and the need to power them efficiently, envi-ronmentally friendly and with less e-waste, research communities turned faces towards harvesting energy from ambient. A permanent magnetic switch stores energy through several mechanisms, primarily involving electromagnetic principles, mechanical components, and magnetic fields. Skeptics often pose a fundamental question when discussing energy systems involving permanent magnets: Where does the energy come from? Magnets perform tangible work—such as holding objects against gravity or creating motion—without an obvious energy source. One of the most promising applications is in kinetic energy storage systems such as flywheels.