Before update G920VVRS4DQE1 was installed, the battery used to last up to 2 days, if I didn't use the phone much. After the update installed, I'm lucky if it lasts 10 hours. On the battery usage page, the Recent Battery Usage percentages only add up to about half of the battery % used. Android System and Phone Idle are the highest percentages. I've restarted it several times, and it has shut itself off a number of time when the battery drains.
Any ideas on what the problem might be and how to fix it would be greatly appreciated.