How to make your Phone's Battery Last Longer.

 

Use the screen less—or at least turn brightness down.

Use the extra power saving mode if you have it.

Keep the screen timeout short.

Turn off Wi-Fi when network is poor.

Dump unnecessary home screen widgets and live wallpaper.

when you aren't using bluetooh turn off it.

when you aren't using WiFi turn off it.

Kill apps when you leave them?

Disable unwanted push notifications:

To preserve battery life, both Apple and Google suggest shutting off push notifications, which are basically app alerts. Notifications need regular communication with notification servers, and each notification causes your phone to wake up for a few seconds, including turning on the screen, to show you a message and give you a chance to act on it.

Auto Synchronization uses background processes that can eat into both your mobile data use and battery life. To turn it off, go to Settings > Accounts. Tap the three vertical dots in the upper right corner and uncheck “Auto-sync data.” You can also manually adjust which apps sync and how frequently.

Another big battery sucker is apps using GPS, Wi-Fi and mobile data for monitoring your location. As a user, you can revoke apps' access to location services, or set levels (in Android) to determine how much power they use. In Settings > Location, you can choose High accuracy when you need it, or Battery saving when you don't.

Be smart about what you allow each app to access. Allowing your apps to integrate with your location, camera, or SD card can be convenient but is most often not necessary. Granting too many permissions to an app that never uses them will drain your battery for no benefit.

To disable location tracking on Android, go to the Settings app, tap Apps, choose an app and select “Permissions,” then tap to disable Location permission.