This simple trick in your settings will save your iPhone battery and prevent battery drain.
It seems more and more users are reporting battery drain after IOS updates. This tip will extend the battery life and get back the power and juice to keep the iPhone battery functioning longer.
Open settings on iPhone
Scroll down, then choose or touch “Passwords & Accounts“
Choose and touch “Fetch New Data“
Choose “Manual” on the accounts.
Turn off Push, make sure it turns grey (not green colour).
Choose “Automatically or Manually” for Fetch.
This is how the settings should look on your iPhone. This will save your battery from draining.
Please note: If “FETCH” is set to “Automatically“, it will fetch and retrieve data when iPhone is plugged in with wifi on.