The exponential growth in the deployment of lithium iron phosphate (LFP) batteries, predominantly driven by their robust safety profiles and long life spans, underlines a pressing need for environmentally sustainable recycling practices. Amidst escalating environmental concerns associated with conventional acid-based recycling techniques, which involve considerable hazardous waste generation and potential ecological damage, this study pioneers a novel green hydrometallurgical process centered on water leaching. This research delves into the extraction of lithium from the LFP black mass via water leaching, subsequently precipitating lithium carbonate to achieve recyclable purity levels. The chosen methodology diverges from traditional acid-based approaches by offering a substantially lower environmental footprint and potentially reducing processing costs due to the elimination of hazardous chemicals. The investigation systematically explores the leaching conditions, aiming to optimize parameters such as temperature, pH, and contact time to maximize lithium yield while adhering to stringent environmental standards. Despite the inherent challenge posed by the generally lower extraction efficiency of water leaching relative to its acid-based counterparts, the findings suggest a viable pathway that harmonizes operational efficiency with ecological responsibility. Furthermore, the study incorporates the use of sodium phosphate or carbonate as precipitating agents, facilitating the recovery of lithium in a form that enhances the sustainability of the recycling process. The results elucidate a balanced trade-off between extraction efficiency and environmental impact, positioning water leaching followed by precipitation as a promising alternative for the sustainable recycling of LFP batteries. This approach not only mitigates the environmental risks associated with traditional methods but also aligns with global sustainability goals, highlighting its potential for broad application in future battery recycling infrastructures.