The 1500 Megawatt Aperture Science Heavy Duty Super-Colliding Super Button (referred to as "Fifteen Hundred Megawatt Aperture Science Heavy Duty Super-Colliding Super Button" in subtitles) is a testing element used in several Test Chambers of the Aperture Science Enrichment Center.
Sometimes used in a series of triggers with other buttons (Super and/or small) or High Energy Pellet receivers, this large red button located on the ground must be activated by the Test Subject in order to open a door or activate a platform. This is usually achieved by placing a Weighted Storage Cube on the Super Button, or sometimes by temporarily standing on it. Super Buttons are often important in solving puzzles to acquire another cube, or simply complete the Test Chamber. The Weighted Storage Ball Bucket, slated to appear in Portal 2, is to serve the same purpose, only with Weighted Storage Balls instead of Weighted Storage Cubes. The Weighted Pivot Cube is slated to be usable as well on the Super Button in Portal 2. Aperture Science Sentry Guns can be used to weigh down Super Buttons, but only in levels where Sentry Guns can be placed on Super Buttons without use of cheats.