Re: Background App Refresh: On or off?
Originally Posted by Ledsteplin
"After you switch to a different app, some apps run for a short period of time before they're set to a suspended state. Apps that are in a suspended state aren’t actively in use, open, or taking up system resources. With Background App Refresh, suspended apps can check for updates and new content.
If you want suspended apps to check for new content, go to Settings > General > Background App Refresh and turn on Background App Refresh. If you quit an app from the app switcher, it might not be able to run or check for new content before you open it again."
I don't think that's true for ALL apps though. Take the default email app for example; it'll check for new email regardless of being in the app switcher.
All in all, as for my own personal experience I leave things in the app switcher and allow the apps that I use on a daily basis to run in the background. I think though that if I wasn't at my desk in front of my PC as much as I am, I would more than likely tighten things up a lot more to lengthen my battery life during the day.