Prolong 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 device.
Always charge the battery fully.
When power saving mode is activated, device settings, such as Network mode and the screen saver, are optimised.
Press and hold the power key , and select Activate power saving. To deactivate power saving mode, press and hold the power key , and select Deactivate power saving.
Press and hold the menu key, swipe until the desired application is displayed, and select .
Sounds, themes, and effects
Mute unnecessary tones, such as key tones.
Use wired headphones, rather than the loudspeaker.
Change the length of the time-out period after which the device display switches off.
Select Menu > Settings and Phone > Display > Light time-out .
Select Menu > Settings and Themes > General . To change the wallpaper, on the home screen, select Options > Change wallpaper .
Select Menu > Settings and Themes > General > Options > Theme effects > Off .
Select Menu > Settings and Phone > Display > Brightness .
Select Menu > Settings and Themes > Screen saver > None .
If you are listening to music or otherwise using your device, but do not want to make or receive calls, activate the offline profile.
Set your device to check for new mail less frequently.
Use a WLAN connection to connect to the internet, rather than a packet data (GPRS or 3G) connection.
If your device is set to use both GSM and 3G networks (dual mode), the device uses more power when searching for the 3G network.
Select Menu > Settings and Connectivity > Network > Network mode > GSM .
Select Menu > Settings and Connectivity > Bluetooth > Bluetooth > Off .
Select Menu > Settings and Connectivity > WLAN > Options > Settings > Show WLAN availability > Never .
Select Menu > Settings and Connectivity > Admin. settings > Packet data > Packet data connection > When needed .