1 Examine Your Background App Refresh Settings
Head to Settings again, and go to General. Here you can scroll down until you see an option for Background App Refresh. This requires a little bit of explanation – Background App Refresh will give you a list of all the apps that have background refresh options. That means, when they are running in the background they have the option to automatically refresh and carry on other actions even when you aren’t using the app.
Now, there’s nothing wrong with leaving multiple apps up and running as you switch casually between them. This doesn’t actually waste battery life – Apple’s own software expert says so. But background refreshing can waste battery life if it’s enabled on an app. To save more energy, you should turn off refreshing on apps that tend to use a lot of juice.
You can check in the Battery section to see how much energy your apps use. Social network apps like Facebook tend to use the most and are great candidates for switching off background refresh. News apps and similar content-rich apps are other good subjects.