There could be something physically wrong with the battery, and it is overheating – this in turn can lead to battery drain problems or worse. One way to check for battery problems is to remove it from your phone and place it on a flat surface. If it spins freely when you rotate it (try turning it over as well), the bulge that makes this possible is indicative of a problem that needs to be addressed. It could be a simple matter of buying a replacement battery, but it’s worth taking your phone into an authorized repair shop to get it checked out.
If your battery seems to be physically OK, it’s worth checking that your phone and all of its apps are fully up to date. To ensure that you have all of the latest updates for your phone, head to the More section of Settings and tap About Device. Now tap Software Update followed by Update. Download anything that is detected and you can then check for updates for your apps. Fire up the Play Store app, head to My apps and hit Update All to grab any available patches. Having the latest versions of your apps is always a good way to save battery life.