Near field communication (NFC) is a set of protocols that enables electronic devices to establish radio communication with each other by touching the devices together, or bringing them closer, to a distance of typically 10cm or less. People use NFC to transfer data, for payment and etc.
You should turn off NFC so that it doesn't drain your battery:
Swipe down from the top of the screen and tap on the NFC icon (the capital N icon), or go to Settings -> More -> Move the slider next to NFC
Restrict app background data for all applications that are non−essential (Android)
Every application on your device runs in the background, even though you are not using it. This makes sense for things like email and social media applications (Facebook, Twitter and others), where you might want to know the munite you get a new message or a comment, but what about other applications like games, notes and other non essential applications that drain your battery 24/7?
To restrict background app data:
Settings -> Data usage -> Choose an application, tap on it and scroll to the bottom to restrict background data.
Note: You might have to restrict background data for the same application in both the Mobile data and Wi-Fi tabs.
The system cache partition stores temporary system data. It allows the system to access applications quickly and efficiently, but sometimes it gets cluttered and outdated and drains your battery. A periodic cache clearing can help make the system run more smoothly. It's different from clearing individual app caches, and it won't lead to any loss of personal data or settings.
To wipe cache partition:
Power off the device. If you can't do that using the power button, just remove the battery and insert it after 10 seconds.
Press and hold the Volume (+) up and the Power (Sleep/Wake) buttons. Once your device turns on, let go of the buttons. * If you use a Samsung device, press the Power (Sleep/Wake), Volume (+) up and Home button.
Press the Volume up or Volume down key to navigate through the options. Highlight the Wipe cache partition then press the Power (Sleep/Wake) key to make the selection.
Note: Be careful when you are navigating because there are other important options that you should not modify unless you are an advanced user.