Ali-HexA Deep eutectic solvent (DES) was synthesized using hexanoic acid as a hydrogen bond donor and Aliquat 336 as a hydrogen bond acceptor was confirmed by FTIR and proton NMR spectral studies. Density, molar volume, dielectric constant, refractive index, and ultrasonic velocity of binary mixtures of DES and kerosene have been determined at various mole fractions of DES. The excess properties were calculated using different model equations. The solvent extraction of Li, Co, and Ni from simulated lithium-ion battery waste solution using DES in kerosene under varying experimental conditions has been undertaken to know the suitableness of the novel DES extractant-diluent pair.