The cell chemistry and pack that store the car's energy - the flat 'skateboard' under the floor.
The flat 'skateboard' pack under the floor that stores the vehicle's energy via lithium-ion cells and the modules/BMS wiring that bind them together.
Battery cost and chemistry are the single biggest lever on an EV's price and range, and the layer India is most dependent on imported cell technology for.
Cell chemistry and pack engineering carry the deepest margins and IP moat in the car, while legacy lead-acid makers entering Li-ion capture a smaller, more commoditised slice.