PRIV™ by BlackBerry® - Extend Battery Life

Battery life is measured by standby time and talk time.

Standby time is the amount of time the device stays powered on with no voice, data or other usage.
Talk time is based on voice usage.
Using data such as web browsing, apps or streaming reduces overall talk time.

In order to improve battery life, you can:

Disable or uninstall apps (e.g., live wallpapers, etc.) that are consuming too much battery or RAM or aren't being used.
Contact the app developer if an app appears to cause excessive battery drain.
Adjust brightness settings to lowest setting or use Automatic brightness.
Turn off GPS when not in use.
If disabled, certain apps or services may not work properly.
Turn off vibrate mode if not used.
Change account sync settings to lowest frequency.
Remove widgets that automatically update.