My battery does not stay charged for very long

Decrease the screen brightness (Display Settings).
Shorten the display timeout (Display Settings).
Decrease the volume (Adjusting Sound and Notification Volume).
Turn off the wi-fi radio when it is not in use (Connecting to a Wireless Network).
Put the device in power saving mode when not in use (Turning the Device On or Off).
Keep your device away from extreme temperatures.
Do not leave your device in direct sunlight.