Control Background App Refreshing
“Turning off apps may help preserve battery life” is exactly what Apple says in their Background App Refresh section. If we know one thing, it’s that Apple knows what’s best. So take their advice and turn off the apps you don’t need to have refreshing in the background. This is really important if you have a lot of apps installed. Go to Settings > General > Background App Refresh, then start turning off apps that you don’t need running in the background when you aren’t using them.