An archaebacterium gets energy in several different ways depending upon the type it is. Some archaea are lithotrophs, i.e, they obtain their energy from inorganic compounds such as sulfur or ammonia, and use an electron transport chain for the production of ATP. Other archaea which are phototrophs and obtain their energy from sunlight, however photosynthesis does not occur. Thus, these are all the crucial phases that are responsible for providing energy to an Archaebacterium in a hassle-free manner.