Galvanostatic measurements, intermittent titration experiments, and x-ray diffraction analysis indicate that the cathode reaction mechanism in a nonaqueous Zn/V6O13 secondary battery is an intercalation process. The measurements also yielded kinetic parameters such as the chemical diffusion coefficient and mobility of Zn in V6O13 as well as the partial conductivities and mobilities of electrons and ions. Cycling tests confirmed that the reversibility and stability of the cell were good.