Goes without saying the benefits of battery. That way nothing can compete with petrol diesel IC engine vehicles in terms of driveability , power , pick up & Serviceability and no imports except the fuel.
The main issue with batteries are three :
(1) Supply chain and availability of rare earth elements like lithium available only in few nations only. So we are 100% import dependent.
Look at what happened to semiconductor issue during last 2 years. The entire auto industry collapsed.
(2) Lithium batteries stack occupy a lot of space and Requires Recharging and recharging currently done through Thermal power. world over , 90% power is through thermal coal currently.
(3) life cycle Study shows that battery has more carbon emissions than even conventional.
The report is Cradle-to-Grave LCA which takes care of the entire life cycle of extraction, refining , manufacturing, maintenance and recycling for a fixed life of 2,00,000 kms.