Hello, Welcome to the Community. We understand the concern of the battery draining quickly and the phone overheating.
Some things that can help with Battery optimization, if you're just having a battery draining issue, is the following:
Note: The battery adaptive feature may cause the battery to drain a little faster at first until the phone adapts to your usage, and learns how you're operating, the charge will be stored and used in different manners based on how you use your phone. This sometimes can take a few weeks for it to learn the habits and customize itself to make sure you have the best performance and lasting battery.
We also recommend clearing the cache partition. To get to recovery mode: - Turn off phone - Once off, hold down volume up and power buttons simultaneously - When Samsung logo appears, release power button BUT KEEP HOLDING VOLUME UP until the recovery menu appears - Use volume buttons to navigate down to clear cache (NOT CLEAR DATA/ FACTORY RESET) - Use power button to select.
If you've tried troubleshooting above, when it comes to exorbitant drain to the battery, repairs would be recommended. You can use the following link to find a list of service centers in the U.S. that can do the repair: http://www.samsung.com/us/support/service/location or by contacting customer support at 1-800-726-7864.
