This short communication demonstrates that not only pure Fe(VI) cathodes, but also MnO2/Fe(VI) composite cathodes can substantially enhance the high power discharge of alkaline batteries. The 2.8 Omega and 0.7 W high power discharge of alkaline cells are investigated for 3:1 and 1:1 composite MnO2/BaFeO4 cathode cells, provide discharge energies intermediate to that found in the (non-composite) BaFeO4 cathode cell. At a constant 2.8 Q load, the 1:1 composite MnO2/BaFeO4 cell delivers up to 40% higher energy capacity than the MnO2 pure cathode alkaline cell, and up to three-fold the capacity of the constant 0.7 W power MnO2 discharge.