Hello, We understand the concern of the battery draining quickly.
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.
If you're receiving an overheating message check out the following link:
If you've tried troubleshooting above, when it comes to problems overheating or 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.
For international customers, please use this link: https://www.samsung.com/us/common/visitlocationsite.html
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