Adjusting your iPhone's "Background App Refresh" setting can help you save battery life and data. Background App Refresh is a feature that enables apps to update with new information in the background. You can turn the feature off, only enable it when you're connected to a Wi-Fi network, or only apply it to specific apps. Visit Business Insider's homepage for more stories. Considering we rely on our smartphones for just about everything - from getting directions to listening to music and