Spent lithium-ion batteries represent one of the most critical environmental and industrial crises facing the modern world due to their high toxicity, massive accumulation in landfills, and the loss of critical elements. Conversely, global mines and conventional mining operations. This scientific article aims to highlight chemical recycling technologies as an innovative engineering solution combining extractive processing of e-waste with high-quality recovery of critical metals used directly in battery remanufacturing and sustainable power generation. Since the onset of the digital revolution and the rise of electric vehicles, lithium-ion batteries have become an essential component across all technological industries; however, the depletion of their constituents has turned into an environmental and economic burden as batteries take decades to decompose while leaching toxic substances. With the growing global movement toward circular economies, the need arose to transform this chemical waste from mere environmental hazards into a sustainable source of rare metals, where the chemical extraction of lithium and cobalt forms the bridge connecting hazardous waste management with energy production and storage sectors. The metal recovery process from spent batteries relies on hydrometallurgical and thermochemical processing techniques, which involve the chemical breakdown and separation of metallic bonds and complexes without generating harmful emissions. The process begins with sorting spent batteries, fully discharging their electrical energy, and mechanically shredding them into a fine powder. This material is then fed into acid and base leaching reactors under controlled temperatures and pressures. Driven by chemical reagents, metal oxides convert into hydrocarbon salts and purified solutions, which are subsequently concentrated and separated into high-purity compounds alongside safe secondary byproducts. Not all chemical components are equal in terms of recovery yield and economic value, as cathode materials containing high proportions of precious elements serve as the ideal feedstock. Lithium cobalt nickel manganese oxides, along with upgraded graphite, stand out as the top candidates yielding high recovery rates of pure metals reaching over eighty percent of their original mass. Conversely, outer plastic casings and severely damaged non-separable components are typically excluded, as they hinder chemical reactions and cause excessive consumption of solvents. The metals recovered through chemical recycling exhibit physicochemical properties and purity levels that match or exceed virgin metals extracted from natural mines, making them suitable for direct application in next-generation battery cell manufacturing. These recovered materials can be utilized directly in constructing energy storage units or powering grid support systems. Furthermore, secondary chemical reagents generated during the process are recycled internally, achieving self-sufficiency for extraction operations. This strategy delivers integrated environmental and economic benefits; it reduces hazardous waste volumes and lowers the carbon footprint associated with traditional mining and refining. It also provides a localized, cost-effective raw material supply for technology sectors and manufacturing, thereby supporting the circular economy and creating new job opportunities in chemical recycling and alternative energy materials management. Despite promising opportunities, several challenges hinder the commercial scaling of this technology, such as high costs of acids and solvents and the requirement for precise separation of chemically similar metals before their deployment in sensitive energy applications. Developing more efficient, environmentally friendly, and cost-effective chemical extraction routes remains the decisive factor in making battery recycling a commercially competitive alternative to traditional supply chains in the coming decades. Al-Mustaqbal University – The First Private University in Iraq