A process for recovering materials from rechargeable lithium-ion batteries comprising: i. processing lithium-ion batteries to form a size-reduced feed stream; ii. separating the size-reduced feed stream into a magnetic product stream and a non-magnetic feed stream; iii. optionally isolating a ferrous product from the magnetic product stream; iv. stripping the non-magnetic feed stream with a stripping solvent to form a stripped slurry stream; v. separating the stripped slurry stream into an oversize solids portion and an undersize stripped slurry stream; vi. optionally separating the oversize solids portion of the stripped slurry stream into a preliminary aluminum product stream, a preliminary copper product stream, and a plastic product stream; vii. subjecting the undersize stripped slurry stream to a solid-liquid separation to form a black mass solid stream and recovered stripping solvent; viii. leaching the black mass solid stream with an acid to form a pregnant leach solution and residual solids; ix. separating the pregnant leach solution from the residual solids to form a first product stream comprising the residual solids and a second product stream comprising the pregnant leach solution; x. optionally isolating a graphite product from the first product stream; xi. isolating a copper product from the second product stream to form a third product stream; xii. isolating an aluminum (Al) and/or iron (Fe) product from the third product stream to form a fourth product stream; xiii. isolating a cobalt (Co), nickel (Ni), and/or manganese (Mn) product from the fourth product stream to form a fifth product stream; xiv. isolating a salt by-product from the fifth product stream to form a sixth product stream; and xv. isolating a lithium product from the sixth product stream. i. processing lithium-ion batteries to form a size-reduced feed stream; ii. separating the size-reduced feed stream into a magnetic product stream and a non-magnetic feed stream; iii. optionally isolating a ferrous product from the magnetic product stream; iv. stripping the non-magnetic feed stream with a stripping solvent to form a stripped slurry stream; v. separating the stripped slurry stream into an oversize solids portion and an undersize stripped slurry stream; vi. optionally separating the oversize solids portion of the stripped slurry stream into a preliminary aluminum product stream, a preliminary copper product stream, and a plastic product stream; vii. subjecting the undersize stripped slurry stream to a solid-liquid separation to form a black mass solid stream and recovered stripping solvent; viii. leaching the black mass solid stream with an acid to form a pregnant leach solution and residual solids; ix. separating the pregnant leach solution from the residual solids to form a first product stream comprising the residual solids and a second product stream comprising the pregnant leach solution; x. optionally isolating a graphite product from the first product stream; xi. isolating a copper product from the second product stream to form a third product stream; xii. isolating an aluminum (Al) and/or iron (Fe) product from the third product stream to form a fourth product stream; xiii. isolating a cobalt (Co), nickel (Ni), and/or manganese (Mn) product from the fourth product stream to form a fifth product stream; xiv. isolating a salt by-product from the fifth product stream to form a sixth product stream; and xv. isolating a lithium product from the sixth product stream.