how to close running app for galaxy note 4

my apps always running down my battery

When you're finished running an app, hit the back button (it may need to be hit more than once) to back out of the app. If you just hit the Home button, you're leaving the app running, while you go back to the home page (and probably run another app).

Some apps will always be running in the background, like Android System and Phone Idle - there's nothing you can do about them. (Android System has to be running or the phone would be off. Phone Idle is the phone waiting for a call - if that stopped you'd never get calls.) If you have a weather widget showing the weather on the home page, that will be running too. Things like that are normal - we all have apps that run all the time.

Normally when apps go to the background, they shouldn't be using any negligible battery life, with the exception of those meant to run for syncing and such. Unless a bug pops up, most apps should be more or less dormant in the background.

A lot of people mistakenly believe Android operates like Windows, and think unused apps should be force closed. It's not like Windows, and your phone's memory takes up the same amount of battery power whether it's used or not. Android is meant to keep it full to save power by not having to initialize common apps all the time. So if you start arbitrarily closing out apps in effort to save battery life, you can actually decrease its life because Android will simply initialize another app in the background to have at the ready.

Being that your phone is a relatively old model, have you ever replaced the battery? If not, my guess is that's your problem. Unfortunately, I have no idea if anyone makes the Note 4 batteries anymore. Chances are, even "new" batteries may have been sitting on a shelf for years. If you don't replace it with a fresh one, then you run the risk of reduced battery life right out of the box due to its age alone.

Thanks for saving me the trouble of explaining all that. :)

And Amazon still has loads of Note 4 batteries for about $10. (Battery manufacturers will keep making new ones as long as there's a demand for them.)

Originally Posted by Rukbat

And Amazon still has loads of Note 4 batteries for about $10. (Battery manufacturers will keep making new ones as long as there's a demand for them.)

I know the Note 4 is still relatively popular, but not sure if it was still popular enough for continual battery manufacturing.