Energy Tank

Energy Tanks increase Samus's maximum energy by 100. They appear in almost every Metroid game and are vital for survival. While some can be found in open areas and are easy to obtain, some are well hidden and require excessive searching to find. The traditional number of Energy Tanks found in a Metroid game usually hovers around the fourteen mark, although it has gone as low as four (In the original Metroid), and to as high as twenty (In Metroid Fusion). In Metroid Prime 3: Corruption, two energy tanks are unavoidable, meaning you must obtain them. The energy tank must also be used to activate hypermode, a function required several times throughout the course of the game.