The Collaborative International Dictionary of English v.0.48:

high-power \high-power\ high-powered \high-powered\adj.
   1. vigorously energetic or forceful. high-powered executives

   Syn: high-octane, high-voltage.
        [WordNet 1.5]

   2. capable of a high degree of magnification; -- used of
      optical instruments such as microscopes or telescopes. a
      high-powered microscope
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

high-powered
    adj 1: vigorously energetic or forceful; "a high-octane sales
           manager"; "a high-octane marketing plan"; "high-powered
           executives"; "a high-voltage theatrical entrepreneur"
           [syn: high-octane, high-powered, high-power, high-
           voltage, high-energy]
    2: (used of microscopes) capable of a high degree of
       magnification; "a high-powered microscope"