On app manager I can see apps are still active when I close them and use battery. Any way how I can close them all with one button don't like to manually close them always.
Are you exiting the apps, backing out of them or just hitting the Home button. Each does a different thing. (A well-written app should have an exit button or menu choice and should stop running when you exit. It may still remain in RAM, though - that's up to Android.)