Setting your phones screen to a high resolution have immense effect on your battery life. So keeping your phone at a low resolution helps in improving battery life.
4. Facebook App
Surprising right? When it comes to killing boredom, Facebook can be of great help. But as it's killing boredom, it's also killing your battery. Its advisable to use the web version of Facebook rather than the app.
5. Close applications the proper way.
Force stopping applications is the proper way of killing and application because some application still run in the background even though its be terminated from the tab.