The reason isn't just rising temperatures or battery quality but a lack of thermal-based safety precautions. The EV batteries are getting heated beyond 100 degrees, experts claim.

The incidents involved three companies, including Ola Electric, which is backed by Japan's SoftBank Group and was the country's top-selling e-scooter maker in April

Ather, which counts Tiger Global and Indian bikemaker Hero MotoCorp as investors, has raised about $160 million since its inception in 2013