Sparingly water-soluble agents can be formulated as cyclodextrin complexes, however, these water-soluble drug-cyclodextrin complexes dissociate when the complex is administered into patients. The compressors described herein are efficient, run quietly, use less power, and last longer than those previously known in the art. Second, a flow of electrolyte, such as zinc species in the ZnFe battery, with a high level of mixing through at least one negative half cell in a Zn deposition region proximate a deposition surface where the electrolyte close to the deposition surface has sufficiently high zinc concentration for deposition rates on the deposition surface that sustain the uniform high current density.