Process stats and battery usageFirst of all, if you want to know which apps are running background processes and how power hungry they are, both in terms of processing power and impact on battery, Android has these monitoring options built in.
- Enable Developer Options by going to Settings > About Device and tapping the Build number until you are notified that Developer Options have been enabled.
- Go to Settings > Developer options > Process stats to see how much of the time your key apps are running. Tap any app to see how much RAM it's using.
- Next, go to Settings > Battery then tap the individual apps to see how much battery they're using.
Which apps should I stop running in the background?A big culprit of background memory and battery usage is games you're not playing, and music players you're not using. If you can see no logical reason for an app you know well to be running in the background, then you should probably close it.
As a general, you should leave most apps/services starting with the word 'Google' running. So DON'T STOP THE FOLLOWING APPS (really essential services won't let you force stop them anyway):
- Google Search, Google Play services, Google Contacts Sync, Google Keyboard, Google Play Store
How to disable, stop and uninstall background appsIf you have an app that you think is using an unreasonable amount of processor power or seems to be running in the background way more than it should, then you can either:
- Disable it in your App Manager by going to Settings > Applications > Application manager, tapping the app, then tapping Disable.
- Since the Lollipop update, you can close recent apps easily by tapping the Recent Apps navigation button on your phone (to the right of the home button), then swiping left or right to close apps you ran recently.
- Delete it from your phone by going to Settings > Applications > Application manager, tapping the app, then tapping Uninstall
- Or Force Stop it by going to Settings > Applications > Application manager, swiping right to the Running tab, tapping the app, then tapping Force Stop