Scaling and stabilising lithium-ion battery cell manufacturing in India is critical to India realising its decarbonisation goals. This issue brief deconstructs the lithium-ion battery cell manufacturing process, estimates the material and finance requirements, and offers a blueprint for a possible indigenisation strategy. A significant portion of the rapidly growing battery demand projected between 2021-2022 and 2029-30 from India’s power and mobility sector can be met by domestic battery manufacturing. This study finds that enabling such a large-scale buildout will require mobilisation of significant capital and securing of battery components and electrode materials to supply the industry.