Does the battery drain of your apps add up to the total battery you've lost? For example I'm down 8% but if I add up the app battery usage percentages for each app in the battery menu it only adds up to 5%.
I would like to recommend that you try Installing the Samsung Good Guardians application from the Galaxy store which will allow you to optimize your phone's applications and also battery life plus it has a built-in memory Manger that can be customized for your habits and usage, the application does help with the overall performance of your phone and I recommend running the application process every few weeks, please see the attached link https://apps.samsung.com/appquery/appDetail.as?appId=com.android.samsung.utilityapp
