Fatigue and sleep loss are crucial factors in everyday life, as they can deeply affect human productivity and health. Fatigue assessment is really important in certain applications: having detailed information about workers’ fatigue levels may be vital in preventing possible catastrophic accidents. Monotonous activities such as highway driving may be severely affected by high levels of fatigue. For this reason, increasing the number of tools able to collect such information is really important for improving road safety and various other everyday situations. For this purpose, analyzing potential correlation between vigilance tests and body battery could provide valuable insights. In particular, vigilance tests like Psychomotor Vigilance Task (PVT) and Three Choice Vigilance Task (3CVT) are widely used in fatigue and sleep loss research fields due to their easy of use.