Nokia N97 - Manual (Page 15)

● 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 3G
network. You can set the device to use only the GSM
network. To use only the GSM network, select
Menu > Settings and Connectivity > 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. Select Menu >
Settings and Phone > Display > Light time-
out . To adjust the light sensor that observes lighting
conditions and adjusts the display brightness, in the
display settings, select Light sensor .
● Leaving applications running in the background
increases the demand on battery power. To close
the applications you are not using, if they are not
responding, select Options > Show open apps. ,
and go to the application using the menu key. Press
and hold the menu key to open the application, and
select Options > Exit .
Free memory
To view how much space 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 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
● Calendar notes
● Applications shown in Application manager that you
do not need
● Installation files (.sis or .sisx) of applications you
have installed. Transfer the installation files to a
compatible computer.
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