Follow this set up in order to save your iOS 8 Battery
If you not using Wi-Fi or Bluetooth ,then close it
Turn on only notifications that you need.
eg. facebook , Line
Settings > General > Accessibility > Increase Contrast
close all beauty functions that you don't use.
close all beauty functions that you don't use.
Settings > General > Accessibility > Reduce Motion
Open Reduce motion mode.
Settings > General > Background App Refresh
Close some appication that still connecting to internet even it is closing.
Settings > General > Auto-Lock > 1 minute
set auto lock to 1 minute.
Settings > Display & Brightness
Turn off auto brightness.
Settings > Privacy > Location Services
Turn off Location Services
Hope you guys have 100% Battery.