See a ranking list of apps that are using the battery.
You can also see how much and how long the battery has been used for each app.
Slide the Notifications panel open, and then tap .
Tap an app to check how it's using the battery. You'll see how much battery power is used by resources such as the CPU for the app and other use details.
Tip: If you see buttons while viewing an app's battery use details, you can tap them to adjust settings that affect battery usage, stop the app, and more.