Lithium mixed metal oxides, sourced from battery waste or black mass, can be effectively leached using 2M sulfuric acid at room temperature, with controlled addition of hydrogen peroxide as a reducing agent. This innovative approach distinguishes itself by operating at a constant solids loading of 10 per cent, eliminating the need for high temperatures, and minimising the inefficiencies associated with rapid dissolution and side reactions of peroxide observed in conventional methods. Despite its advantages, the dissolution process slows over time under lower temperatures and relatively higher solid loading, necessitating longer leach periods for near-complete extraction of valuable elements. To enhance process efficiency and facilitate industrial adaptation, strategies such as recirculation of leach liquors and residues were evaluated. additionally, a two-step recirculating batch process was tested, allowing the reuse of both solids and leach liquor to improve combined leaching efficiency and the carbon quality of the final residue. The process demonstrated exceptional recovery rates of 96-99 per cent for Co and near-complete extraction of Mn, Ni and Li. Furthermore, the by-product leach residue graded 95 per cent total carbon, indicating the potential for resourceful utilisation of waste materials in a continuous industrial framework.