I am aware that the new Extremis armor allows Tony to connect and interface with computers and satellites world wide. Does he need to engage the undersheath to allow him access these systems or is this a new inherit ability? For instance, if Tony needed to mentally access a computer while not wearing the Iron Man armor, could he do so without using the undersheath? One other question, I know that the undersheath is meant to act as a replacement for the previous armors HUD and AI units, respectively, but it's not a power source, right? What acts as the new power source for the external Extremis armor since Tony no longer has the arc reactor at this point?
Extremis undersheath and power source questions
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