The PriorityStart! ProMax is an automatic computerized voltage disconnect system that protects vehicle batteries. The PriprotyStart ProMax only operates when needed; it passively monitors the battery voltage when the key is off. If it detects any drain on the battery below a certain voltage for a full minute, it automatically disconnects it. PriorityStart! ProMax has made improvements for 2006 to its computer microprocessor, as well as having a stronger, redesigned gear system (30-percent increase in strength, more precise operation of gear system) and a new surge "spike" protection circuit to prevent electrical surges.