System Shock Wiki
System Shock Wiki
Illudium-Cadmium Battery
Type Tool
First Found on Level 1 - Hospital
Destructible No
Stackable No

An Illudium-Cadmium Battery or I-Cad Battery is an item found in System Shock.

It is a more powerful version of Battery Packs found aboard Citadel Station. Using one will completely restore the Hacker's energy, filling the meter all the way to its maximum value (255 units). They are way less common than their weaker counterpart (there are only 10 of them in the whole game), and should be conserved for only the most dire situations.


  • Illudium is a radioactive ore found in the Kilrathi Empire in the video game Wing Commander, also made by Origin.
  • Illudium is also a fictional element from the cartoons featuring Marvin the Martian, who mentions the "Illudium Q-36 Explosive Space Modulator".