For the fast charge of lithium-ion batteries, internal resistances must be decreased. Among the internal resistances, charge (lithium-ion) transfer resistances and ion transport resistances inside the composite electrode are the major ones. Charge transfer resistance of R_ct can be expressed by 1/R_ct = A/T exp(-E_a/RT). Here, A, T, E_a, and R are pre-exponential factor, absolute temperature, activation energy, and gas constant, respectively. We have extensively studied the activation energies for the charge transfer reactions, and concluded that de-solvation process is responsible for the activation energies. Then, we have tried to understand the pre-exponential factor of A. This factor corresponds to the reaction sites of insertion active materials. Here we evaluated the reaction sites of high oriented pyrolytic graphite by several methods, and the charge transfer resistances of graphite electrode were correlated with the reaction sites.