Nanometer level surgical work requires novel energy sources to extend the therapeutic potential of medical devices. Inverse mass ratio batteries are an advance in energy production that deploy an “irrigant within water” designed from the scientific discipline of Engineered Irrigants. This report discusses the derivation of inverse mass ratio batteries from alternating current redox magnetohydrodynamics as developed to power the physiochemical scalpel; a tissue rescue energy-based device system for wound healing that enables precision resection, advantageous extracellular matrix modifications, and initiation of biosynthetic tissue assembly.