11. Close Down or Delete Apps
There are a lot of people who are not aware of this fact. Once you close go back to the home screen after using an app, it is still running in the background. This drains a lot of batteries. So next time, double tap the main button and swipe the apps up or down to completely close them. There are some apps which you never use. In those cases, just delete them. Press them till they become wobbly and then press the cross. You are done deleting them.