Dear Samsung Member,
Greetings from Samsung Customer Support!
Apologies for the delay in response. However, understanding the criticality of the situation; we had to ensure the wellbeing and safety of our employees which led to the delay in response.
Hope your issue is resolved. In case the issue still persists please follow the below mentioned steps.
To avoid battery drainage please turn off un-used options, decrease display brightness, turn off auto sync option, close background running apps.
Follow the troubleshooting steps provided in the given link to resolve battrey drainage problem: http://www.samsung.com/in/support/skp/faq/1101689
If issue still persist, kindly register your concern in Samsung members app (Samsung Member > Get help > send feedback > Ask question/Error report)
Thank you for writing to Samsung.
Samsung Customer Support