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• The Maps application downloads new map
information when you scroll to new areas on the map,
which increases the demand on battery power. You
can prevent the automatic download of new maps.
• 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.
If the network mode is set to dual mode in the network
settings, the device searches for the UMTS network.
You can set the device to use only the GSM network.
To use only the GSM network, select Menu > Tools >
Settings and Phone > Network > Network
mode > GSM.
• The backlight of the display increases the demand on
battery power. In the display settings, you can change
the length of the time-out period after which the
backlight is switched off, and adjust the light sensor
that observes lighting conditions and adjusts the
display brightness. Select Menu > Tools > Settings
and General > Personalisation > Display and Light
time-out or Brightness.
• Leaving applications running in the background
increases the demand on battery power. To close the
applications you are not using, press and hold the
menu key, scroll to the application, and press C.
• To save power, activate the power save mode. Press
the power key, and select Activate power saving. To
deactivate it, press the power key, and select
Deactivate power saving. You may not be able to
change the settings of certain applications when the
power save mode is turned on.
Free memory
To view how much memory is available for different data
types, select Menu > Applications > Office > File mgr..
Many features of the device use memory to store data. The
device notifies you if available memory is low.
To free memory, transfer data to an alternative memory
(if available) or compatible computer.
To remove data you no longer need, use File manager or
the respective application. You can remove the following:
• Messages in the folders in Messaging and retrieved e-
mail messages from the mailbox
• Saved web pages
• Contact information
• Calendar notes
• Applications shown in Application manager that you
do not need
• Installation files (with .sis or .sisx file extensions) of
installed applications. Back up the installation files to
a compatible computer.
• Images and video clips in Photos.
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