A spacesuit is a fairly easily identifiable piece of equipment in spacecraft. It's purpose is to keep it's interior distinct from the exterior in terms of the pressure, and temperature differentials that apply in space, in vacuum. To an extent it must also serve as a radiation shield.
Like so many other technology products, spacesuits too have evolved over time. The wikipedia article referenced above lists several variations categorized as the Soviet/Russian, American, and Chinese.
Given all that a spacesuit must be capable of, what is the energy/power requirement of the following space-suits