Cell Recognizer - This device is used to modify a lightsaber such that it will not function for anyone except certain people. If the cell patterns do not match that of designated "safe" users, the weapon's power cells shut down, and any failsafe devices are activated. Failsafe devices can range from electrocution to a loud warble to a quiet beacon which alerts the owner via comlink that the weapon is in the hands of an unauthoried bearer.