Recycling lithium-ion batteries has gained momentum over the past few years owing to the escalating demand for critical materials, with Deep Eutectic Solvents (DES) being noted as alternative green lixiviants for hydrometallurgical pathways. While polarity, pH, and H-bonding contribute to the high leaching efficiencies (LE) of these solvents, the exact role of the eutectic composition remains unclear. Moreover, high viscosities of DESs often lead to high temperature and time requirements, deterr