Gavyturh,Its better you stay calm first. There is no issue with the battery. Its the apps that run in background. A complete 100% charge will stand for 7-8 hours (If your usage is very high). Follow the below steps:-1. Use the Power Saving Feature.2....
It is a rare case, better you downgrade your mobile to the stock OS. You can get it from www.sammobiles.com, after downloading your required file, install that through Odin.Thank you!
