There are numerous review videos on internet where S1 Pro get heated and stalls abruptly. And these issues are common across all the S1 Pro delivered across India. Given, that summer has come it would be interesting to see how S1 pro battery works. We can expect few more such instances since peak of summer is yet to reach. There could be more issues in the densely populated places such Mumbai, Delhi and Hyderabad.
With S1 Pro having issues, the only sensible choice as of now should be Ather 450x. It has not yet reported any battery issues and it has better battery management system as compared to S1 Pro.