Rhen Drive

A Rhen Drive is the heart of a Mechromia, where its base programs are stored. It also unifies the millions of nanobots swimming through the biotic circulatory systems to every part of the body. Interfacing with the android's CPU, it stores a copy of all of the memories the android experiences over time.

Appearance
Rhen Drives vary slightly by design, but all of them are slightly larger than a baseball. They are spherical, with intricate lines running across the outside similar to that of a computer chip. Inside is a single ball of light containing highly energetic Kidanium crystals, which can be blue, red, purple, or white. The energy mass is held in place by a set of diodes protruding inwards from the edges of the other shell.

Trivia

 * A Rhen Drive is very unique, and no two are exactly alike.
 * A Rhen Drive is durable enough to survive a fall from an 8 story building. However if one were to break, the resulting explosion would destroy said building.
 * The average cost for creating a Rhen Drive from scratch is about the same as a motorcycle engine.