Prolong Battery Life - Nokia E73 User Manual

Find help
• Personal Unblocking Key (PUK) code and PUK2 code — These codes (8 digits) are
required to change a blocked PIN code or PIN2 code, respectively. If the codes are
not supplied with the SIM card, contact the network service provider whose SIM card
is in your device.
• UPUK code — This code (8 digits) is required to change a blocked UPIN code. If the
code is not supplied with the USIM card, contact the network service provider whose
USIM card is in your device.
• International Mobile Equipment Identity (IMEI) number — This number (15 or 17
digits) is used to identify valid devices on the GSM network. Devices that are, for
example, stolen, can be blocked from accessing the network. The IMEI number for
your device can be found under the battery.

Prolong battery life

Many features in your device increase the demand on battery power and reduce the
battery lifetime. To save battery power, note the following:
• Features that use Bluetooth technology, or allowing such features to run in the
background while using other features, increase the demand on battery power.
Deactivate Bluetooth technology when you do not need it.
• Features that use wireless LAN (WLAN), or allowing such features to run in the
background while using other features, increase the demand on battery power.
WLAN on your Nokia device deactivates when you are not trying to connect, not
connected to an access point, or not scanning for available networks. To further
reduce battery consumption, you can specify that your device does not scan, or scans
less often, for available networks in the background.
• If you have set Packet data connection
and there is no packet data coverage (GPRS), the device periodically tries to establish
a packet data connection. To prolong the operating time of your device, select
Menu Ctrl. panel Settings
> >
connection When needed.
>
• 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
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
10
Cyan Cyan Magenta Magenta
to When available
and Connection Packet data
>
Ctrl. panel Settings and
> >
www.nokia.com/support
Yellow Yellow Black Black
in connection settings,
Packet data
>
Phone Network
> >