Your phone has a built-in setting that will show you the breakdown of your battery usage. See the steps below to locate this setting in your phone.
Open the App drawer.
Locate and select the Settings app.
Scroll down and select Battery under the DEVICE heading.
You’re now on the Battery Usage screen and can see what’s draining your battery most. Check out our Battery-Saving Ideas article for some suggestions that might help your battery last longer.