The increasing prevalence of electric mobility highlights a growing demand for batteries, emphasizing the need to address the end-of-life management of these vital components. Electric vehicle (EV) batteries, at the peak of their operational lifespan, offer substantial potential for reuse, unlocking economic value from valuable materials. However, this optimistic outlook is at risk without proper waste management practices. In Indonesia, annual EV sales surge by 13–90%, yet there is a lack of regulations regarding the management of EV waste, especially the disposal of battery components with hazardous chemicals upon expiration. This study projects annual battery collection in Indonesia from 2024 to 2030, considering the 8-year battery life of EVs. Using five forecasting methods and a literature study on waste management for EV components, particularly batteries, the projections for 2035 estimate 449,905 units (low scenario), 473,581 units (reference scenario), and 497,262 units (high scenario). The substantial volume of used batteries and their potential negative impacts necessitate immediate action. Urgent collaborative efforts among stakeholders, the government, manufacturers, and relevant entities are required to formulate policies addressing the management of EV battery waste. The absence of effective waste management poses risks of adverse environmental impacts and economic losses, underscoring the urgency of joint initiatives to establish a comprehensive policy for managing EV battery waste in Indonesia. This study highlights the significance of collaborative efforts to ensure EV batteries’ sustainable and responsible disposal in the dynamic electric mobility landscape, emphasizing the need for a holistic approach to tackle this growing environmental challenge.