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• If the signal strength of the cellular network varies much in your area, your
device must scan for the available network repeatedly. This increases the
demand on battery power.
• The backlight of the display increases the demand on battery power. In the
display settings, you can adjust the display brightness and change the time-out
period after which the backlight is switched off. Select Menu > Settings and
Phone > Display > Brightness or Light time-out.
• Leaving applications running in the background increases the demand on
battery power. To close an application you are not using, press and hold the
menu key, select and hold the application, and select Exit. This is not supported
by all applications.
Free memory
To view how much space is available for different data types, select Menu >
Applications > File mgr..
Many features of the device use memory to store data. The device notifies you if the
memory in different memory locations is low.
To free memory, transfer data to a compatible memory card (if available) or to a
compatible computer.
To remove data you no longer need, use File manager or open the respective
application. You can remove the following:
• Messages in the folders in Messaging and retrieved e-mail messages in the
mailbox
• Saved web pages
• Contact information
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