Energy Tanks, as the name alone might hint to, allow Samus to recover her various energies throughout her journey. Across each and every Area of Planet SR388, there will be Energy Tanks for Samus to recover at. Some are harder to find than others, but each play a crucial part in Samus surviving as newer and stronger foes begin to attack her. Without properly refueling Samus' Energy at these Stations, a player will have many troubles enduring all the attacks of the Metroids.