While the different charge partition schemes tend to agree qualitatively, the exact values may differ significantly. Ullah et al. used multiple charge partition schemes to analyze the adsorption and mobility of alkali-ions on boron-arsenide and found values for lithium from +0.99e(Bader) to +0.18e (Mulliken). These discrepancies between the different methods are not surprising, as both Mulliken and Hirshfeld charges tend to underestimate charges, while Bader charges are sometimes overestimated. The choice of the charge partitioning scheme should therefore depend on the desired chemical property and an understanding of the system in question. Löwdin population analysis has been shown to yield chemically reasonable charges for a variety of Li and Na-based cathode materials, while Bader charges can be used to derive oxidation states. Lastly, the Hirshfeld method's use of the deformation density leads to generally physically meaningful results for the charge transfer. The exact value extracted from charge partitioning schemes should, however, always be handled with caution, and any comparison between charges determined by different methods should only be attempted with a solid understanding of the methodologies of the different schemes. These difficulties concerning comparing differently derived charges may complicate future machine learning attempts to find possible descriptors. These same discrepancies between the charge partitioning schemes make it difficult to identify the nature of the migrating charge carrier with regard to its ionicity. In order to resolve this question the charge of the migrating species in the transition state should be examined for a variety of compounds, where the Hirshfeld method is expected to yield the most reasonable results due to it deriving charges based on the deformation density.