Application of different energy sources in surgery is increasingly gaining ground. In addition, novel energy devices have been created, replacing or enhancing traditional tools such as monopolar or bipolar cautery. Dr. Antonello Forgione, Scientific Director at AIMS academy Italy, describes function principles of energy devices, their common pitfalls, and their proper use. New energy forms such as radiofrequency ablation and ultrasonic dissection are also presented, introducing us to a brand-new field of possibilities.