To resolve the battery drainage issue please follow the troubleshooting steps provided in the given link: http://www.samsung.com/in/support/skp/faq/1101689
Please perform the following steps to resolve fingerprint issue:
> If any screen guard/tampered glass/protection film is available then first disable the fingerprint settings and then remove the screen guard.
> Once screen guard is removed now register the fingerprint again and check the issue.
> If problem does not get resolved, run the device in Safe mode and reconfigure the fingerprint.
For further assistance, register your concern in Samsung members application (Open Samsung members app >> click on “+“icon > send feedback >> error report / ask question).
Team Samsung Members