Yes he would if he was near an EMP burst. But he wasn't. Plus being a cyborg covered with human flesh and the eyes to perfection how would the people of Zion even know the difference. They would not if Hamann is a cyborg. There would be no metallic surfaces on his body. Sleeping would not be necessary but no would know that. His excuse is that he only sleeps are few hours per night and he hates sleeping. There are alot of people like that. No red flags there.