Edited sentence: 18 is fitted with a device that gives her a continuous energy supply.As a cyborg, Android 18 is extremely powerful, she is able to easily overpower a Super Saiyan.This is first demonstrated to when she fights Super Saiyan Vegeta, she is able to severely injure him and walk away almost completely unscathed.This prevents her from becoming exhausted while fighting, and augments her power enough to make her a formidable opponent even for a Saiyan