Beam Ammo

From Wikitroid, the Metroid wiki

This appears in Metroid Prime 2: Echoes. It is used with either the Dark Beam or the Light Beam, and also the Annihilator Beam. In order to increase the ammount of beam ammo you can hold you have to collect a Beam Ammo Expansion. You start with 50 units, and every expanstion lets you carry 50 more up to a max of 250.