Ion Cube (Subnautica)

Ion Cubes are a piece of technology created by the Precursors. They are capable of containing massive amounts of energy equivalent to a 'small nuclear detonation' in a stable state. Ion Cubes are used to power certain Precursor devices, such as Alien Arches, which will only function once an Ion Cube has been inserted. They can also be used to craft Purple Alien Tablet, as well as modify to become versions of Batteries and Power Cells.

Ion Cubes can be found in Alien Bases, and Caches. Large Ion Cube Deposits can be found in the Alien Thermal Plant and the Primary Containment Facility and require the Prawn Suit Drill Arm equipped to break them up before they can be picked up.

An unending supply of Ion Cubes can be acquired from the Large Ion Cube Deposit in the Antechamber within the Primary Containment Facility; after the deposit has been depleted, the platform raises up and a ceiling-mounted laser begins generating a new deposit. Each of these deposits yield three Ion Cubes.

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Trivia

 * The former name for the Ion Cube was Ion Crystal.
 * The Ion Cube was originally planned to also have use in the Ion Cube Matrix crafting recipe.
 * It is interesting to note that the laser in the Primary Containment Facility seems to generate Ion Cubes using the same mechanism as a standard Fabricator.