How do you close apps in iOS 7

If you want to close all the apps, do a reset: Press and hold both Sleep/Wake and Home buttons until the Apple logo appears.

You can close app by app or several at a time by either pressing the Home button twice or swiping up on the iPad screen using four fingers.

Then put one finger on the small window (not the icon) of the app and push it upwards off the screen.

Double tap on the home key, it brings up a line of apps with little screen shots hovering over them. Flip the screen up, kinda of like you're flipping those apps off your screen.

When you're done just press the home key once to exit the mode.

As to battery issues, poke around in the notifications. There's a lot of stuff defaulted to on that you may not need. Also look to the background updating of apps. Background updating of weather and stocks is defaulted to on, which means it's continually going out to update. May not be something you need.