For me, battery draining is usually because of:
1. Latitude - automatic background location reporting. Untick the box to save battery
2. chrome - setting - basic - tap on your gmail account - Sync is on - set to off to save battery
3. Whatsapp application - this drains battery faster when on. And, everytime you restart your phone, it will automatically set sync to on without asking.
If you are willing, you can also hard reset your galaxy player. I found out that after hard reset my device, I would install far less applications than before, therefore saving battery life and space.