Witricity or wireless electricity was presented. Witricity uses induction to transmit power through coils without wires. It was proposed in the 1800s by Nikola Tesla but failed due to issues with power loss and safety. There are three main techniques: inductive coupling for short ranges; resonant inductive coupling for mid ranges; and microwave transmission for long ranges. Witricity has applications like charging electric vehicles and devices. Advantages are efficient power transfer without wires, but disadvantages include safety issues and high costs for long range techniques. Witricity may help address energy demands and reduce energy crisis in the future.