To resolve the issue please follow the troubleshooting steps provided in the given link:
For Battery Drainage:
For Hanging Issue please perform below steps:
1.Clear the RAM memory of device (Scroll down notification panel > Setting> Device care >Memory> Clean Now).
2.Stop the background running app (Tap on the left soft key and close all the running apps).
3.Check for the latest device O/S (Scroll down Notification panel >Settings >Software Update >Download updates manually).
For further assistance, register your concern in Samsung members app(Open Samsung members app>click on “+“icon>send feedback>Error report/ Ask Questions).
Team Samsung Members