Energy armor also known as 'Power Shield' is a type of armor found in Quake II. Unlike other types of armor, the energy armor has to be activated to be used and can be deactivated at will. In this way, the armor can be saved for more difficult fights whilst being put away during easy fights. Energy armor uses Cells as power. When activated, the armor's value is equal to that of the player's current amount of cells (used to power the Hyperblaster and BFG). When the player is hit by an enemy, the energy armor takes damage just like any other armor but it depletes the player's Cell stock.