iOS 7 made it super fun to close your apps: all you have to do is double-click the home button and swipe up on the app preview to blast it into a digital black hole.
What most people tell you is that closing your apps will save your battery life because it keeps the apps from running in the background.
Yes, it does shut down the app, but what you don't know is that you are actually making your battery life worse if you do this on a regular basis. Let me tell you why.
This entire article is about what's draining your iPhone battery. I get this question a lot and this will be my go-to resource.
Link via The Loop.