NOVELTY - The process comprises mechanically grinding the batteries to obtain a battery homogenate comprising nonferrous metals and a fine fraction of black mass containing zinc and manganese compounds, separating the battery homogenate to isolate the black mass, performing acid leach of the black masses to obtain a mixed solution of manganese and zinc salts by a mineral acid, separating solid/liquid to recover the mixed solution of manganese and zinc salt, and selectively recovering the manganese and zinc compounds. Zinc is precipitated in the form of zinc sulfide using a compound.    USE - The process is useful for treating alkaline and saline batteries.    ADVANTAGE - The process is capable of easily and economically treating alkaline and saline batteries with less production of wastes and without electrolytic installation comprising complex compounds thus avoiding the environmental pollution and providing high performance and life to the batteries.    DETAILED DESCRIPTION - The process comprises mechanically grinding the batteries to obtain a battery homogenate comprising nonferrous metals and a fine fraction of black mass containing zinc and manganese compounds, separating the battery homogenate to isolate the black mass, performing acid leach of the black masses to obtain a mixed solution of manganese and zinc salts by a mineral acid, separating solid/liquid to recover the mixed solution of manganese and zinc salt, and selectively recovering the manganese and zinc compounds. Zinc is precipitated in the form of zinc sulfide using a compound, before selective recovering of manganese and zinc compounds. The acid leaching is carried out in the reducer medium. The reducing medium is obtained by adding a reducing agent comprising oxygenated water, and by an alkaline wash of the black mass using water and an alkaline compound. The precipitation of zinc is carried out by adjusting the pH of 3. The selective recovery of manganese and zinc compounds is a liquid/solid separation in which a solid fraction comprising the zinc sulfide is separated by a liquid fraction comprising manganese sulfate. The method further comprises precipitation of manganese in the form of manganese hydroxide or manganese dioxide. The solid fraction containing zinc precipitated as zinc sulfide is washed and repulped in the presence of a mineral acid and optionally hydrogen peroxide. An organic cationic polymer is added to the pulp. The liquid fraction comprising the mixture of filtrate and washing water is injected in step of acid leaching of the black mass. The separation for isolating the black mass comprises a magnetic separation for isolating the ferrous metals from non-ferrous metals, a granulometric separation and/or a densitometric separation.