Increase battery life
If it seems you're always looking for a charger, there are steps you can take to reduce the power consumption of your phone. The key is to find the balance between getting the most out of your phone while getting the battery life you need.
Always charge the battery fully.
Switch battery saver mode on.
To check the battery status, and switch battery saver mode on, select > and battery saver.
Save battery with sound and screen options
Mute unnecessary sounds, such as key press sounds.
Use wired headphones, rather than the loudspeaker.
Select > and lock+wallpaper > Screen times out after .
After you've finished taking photos, press .
Select > and theme > Background > Dark .
Select > and brightness, switch Automatically adjust to Off , and select the desired level.
Use network connections selectively
If you're listening to music or otherwise using your phone, but don't want to make or receive calls, switch flight mode on.
Set your phone to check for new mail less frequently.
Switch Bluetooth on only when needed.
Use a Wi-Fi connection to connect to the internet, rather than a mobile data connection.
Stop your phone scanning for available Wi-Fi networks. Select > and WiFi, and switch WiFi networking to Off .