You can minimize battery usage by terminate unnecessary background-apps or turn off unused features.
Terminating background apps
1. Lollipop OS : Menu(apps) > Settings > Select 'General' tab > Apps > Select the 'Running' tab > Select the app to be terminate > 'Stop'
2. Mashmallow OS : Menu(apps) > Settings > Select 'General' tab > Battery & Power saving > Battery usage > Find the app to terminate and select 'Stop'
Always terminate the app completely by pressing the ‘Back’ button or using the following method.
Routine automatic synchronization feature can be turned off by drag down the notification panel.
In this case, you will reduce battery consumption.