The Bader charge analysis method is among the most used charge partition schemes and falls into the first sharp real space division category. Using Bader et al.'s 51 pioneer work, which establishes a quantum theory of atoms in molecules, this scheme analyses the charge density and divides the real space along minima in the charge density. Bader charges are used to partition the electron density within many material classes of particular interest for the development of batteries. In the case of Spinels, the Bader charge analysis is frequently used to derive values for the oxidation states within the material. The importance of the oxidation state with respect to the ion mobility has been shown for both perovskites, as well as layered oxides, where structures with increased ion mobility can be stabilized depending on the oxidation state of the transition metal. Pramanik et al. used Bader charges to highlight the importance of the oxalate group in redox processes in their perovskite oxalate material. He et al. utilized the Bader charge analysis to describe the lithium mobility in layered oxides. Sotoudeh et al. introduced a new descriptor concept for the ion mobility in crystalline solids in which the charge carriers charge plays an important role. This concept was derived after they had previously shown, using Bader charge analysis, that the stability of ions in chalcogenide spinels can only be understood if deviations from a purely ionic interaction are taken into account. A representative of the soft partitioning category is the Mulliken charge analysis. Akin to the linear combination of atomic orbitals technique, a population analysis is used to divide the system's wave function into atomic orbitals, followed by a division of the atomic overlap population among the involved atoms. Another member of the second category of partitioning schemes is the Hirshfeld method and its many variants. The Hirshfeld method calculates the charge density difference between the charge density of the system and the non-interacting atomic charge densities. Then it divides the resulting deformation density via a sharing function based on the atom's local contribution to the non-interacting atomic charge density. This distribution of the combined deformation density along a sharing function has earned the Hirshfeld method the nickname "stockholder" partition analysis. Xu et al. used this method to show the influence of the anion charge on Li mobility within iodite-type compounds.