These 3 features of iPhones are literal trouble for battery saving, and switching them off makes sense.
Is your Apple iPhone or iPad battery draining fast? There are so many features which iOS offers that we have kept on and are actually not necessary and are sucking the battery dry at the same time. Let's see the 3 very strong ones that can actually save much battery life when switched off.

Background App Refresh of Your Apple Phone
Most apps keep updating data in the background for the iOS devices. So when you are not using the application itself, it will keep fetching information from the Internet within the application. This is a very serious battery drain if this feature is on.
To turn it off:
Settings → General → Background App Refresh → Off
You can also switch off background refresh for some apps if you want.
Also, don't forget about the fact that there is such a surplus of apps mapping with their own GPS, so they all get even tracked down in the background, with or without many case scenarios of using only GPS. All meaninglessly: use of keeping GPS for irrelevant apps is just a drain in battery management.
To turn it off:
Settings → Privacy → Location Services
From here, you can switch off the location tracking of specific apps or deactivate it completely.
Push Notifications on Your Apple Device
Notifications or messages from any app known as push notifications don't only consume battery but also create havoc sometimes for the user; especially those are from social networks or gaming apps.

How would you turn them off?
Settings → Notifications
Here, every notification from any app can be disabled.
Other tips to save battery:
Allow Auto Brightness: It will adjust brightness automatically during the savings. Activate the Low Power Mode to disable all background activities at your iPhone. Control Wi-Fi and Bluetooth: Keep it off when not using. While these measures can help, few push their limits beyond. With these features, your Apple iPhone or iPad would last much longer with those features turned off.
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