Change Your Fetch Settings

Another thing that’s draining your battery without even thinking about it is Mail data fetch. These settings make it so your iPhone is constantly looking for new information, such as emails so it can notify you as soon as you get them.

Most of the time, you don’t need to know when you get an email as soon as it happens, so you can adjust it to a certain amount of time to save battery life.

1. Open the Settings app.
2. Scroll down and go to Passwords & Accounts.
3. Click on Fetch New Data.
4. On the lower part of your screen, you should see when your iPhone is fetching for new data in the background.
5. Set the time to what you feel is best for you. Every 15 Minutes is an excellent option to start.