The sustainable management of spent lithium-ion batteries constitutes a critical pillar for guaranteeing the long-term viability of the global energy transition and the expansion of grid-scale energy storage and electric vehicles. Recycling and recovering critical raw materials—such as lithium, cobalt, nickel, and manganese—provides a strategic engineering and environmental pathway to secure vulnerable material supply chains, reduce reliance on capital-intensive and polluting virgin mining operations, and prevent severe hazards associated with improper electronic and chemical waste disposal. The primary technical and engineering challenges stem from the high structural and chemical heterogeneity of commercial battery packs, which complicates safe automated discharging and dismantling while posing severe thermal runaway and fire risks. Furthermore, extracting high-purity battery-grade metals from the shredded "black mass" presents chemical bottlenecks. Conventional pyrometallurgical processing requires extreme thermal energy inputs and emits toxic off-gases while failing to recover lithium efficiently. Conversely, standard hydrometallurgical routes consume vast quantities of strong mineral acids and generate hazardous wastewater streams that require complex treatment. To overcome these technical hurdles, researchers and engineers have pioneered advanced technological solutions, led by robotic dismantling and intelligent electrical discharging systems integrated with computer vision to ensure operational safety. Concurrently, the development of "Green Hydrometallurgy"—utilizing biodegradable organic acids and ionic liquids—has boosted metal recovery yields above 95% with high purity, minimal energy expenditure, and reduced chemical footprints. This technical framework is further enhanced by Direct Recycling techniques, which restore and recondition the degraded cathode crystal structure without decomposing it into elemental precursors, drastically lowering the carbon footprint and reinforcing the long-term sustainability of the power storage sector. Al-Mustaqbal University – The First Private University in Iraq