You should be able to see in the battery settings "powermaster" what's draining your battery so fast. To get more details, you can install 3rd party battery monitoring apps. Any app with more than 4 stars and 1 million downloads should do the work.
Heating issue will their always in this phone. Plus i was facing lot more issue like bootloop, white screen , green portrait shot, it restarts on its own. Finally returned to flipkart. Only used for 8 days. And had returned it yeaterday
