In the summer of 2020, as much of India's venture capital industry retreated indoors during the country's first pandemic lockdown, a young analyst at Blume Ventures was preoccupied with a question most of the market had already dismissed. Electric rickshaws were multiplying on the streets of India's smaller towns, yet the startups building the batteries and swapping stations behind them were widely seen as too niche and too low-tech to matter. One of those companies, a Delhi startup called Battery Smart, had been passed over by investors who viewed the humble e-rickshaw market as too small for serious returns. Mr. Choubey was not convinced the skeptics were right.