A small business reselling electric two-wheelers in Tamil Nadu has been left with significant losses after discovering that the lithium-ion batteries supplied by their assembler provide only 40 km mileage, not the promised 60 km. The assembler is refusing to exchange the faulty batteries. Advice suggests pursuing legal action, potentially through a civil suit for damages or filing a case under Section 420 IPC, as consumer forums may lack jurisdiction due to the commercial nature of the purchase.