I am having the exact same experiences w/ my S7. I have:
- Cancelled the permissions and notifications on all of the apps
- 'Optimized' the performance, AND
- Followed the steps to 'clear the cache partitions'.
None of thes steps had any effect.
Yesterday, I removed the phone from the charger @ 9:30a, and purposely did not use the phone all day; the battery was dead at 10pm. That approximates an 8% battery drain / hour with zero usage!!
Prior to the update, I was able to get 2.5 - 3 days from a charge (not a heavy user).
Every time Samsung decides to push an update, all of the phone settings are erased, and I am back to a battery that won't last 12 hours.
After the update last summer, I replaced the battery, but that obviously was not the issue. That time, I was able to slow the drain rate by following the steps noted above, but this time they have had no effect.
Read the complaints in this forum across all of the Samsung models, the "battery drain after an update" issue has been ongoing for 3+ years, and Samsung still has not addressed it....
