Prolong battery lifeMany features in your device increase the demandon battery power and reduce the battery life time.To save battery power, note the following:● Features that use Bluetooth technology, orallowing such features to run in the backgroundwhile using other features, increase the demandon battery power. To prolong the operating timeof your device, turn the Bluetooth technology offwhen you do not need it.● Features that use wireless LAN (WLAN), orallowing such features to run in the backgroundwhile using other features, increase the demandon battery power. WLAN on your Nokia deviceswitches off when you are not trying to connect,not connected to another access point, or notscanning for available networks. To furtherreduce battery consumption, you can specify thatyour device does not scan, or scans less often, foravailable networks in the background. WLANswitches off in between background scans. See"Wireless LAN", p. 33. When Scan fornetworks is set to Never, the WLAN availabilityicon is not shown in the standby mode. However,you can still manually scan for available WLANnetworks and connect to WLAN networks asusual.● If you have set Packet data connection toWhen available in connection settings, andthere is no packet data coverage (GPRS), thedevice periodically tries to establish a packetdata connection, which causes increaseddemand on battery power. To prolong theoperating time of your device, select Packetdata connection > When needed.● The Maps application downloads new mapinformation when you scroll to new areas on themap, which increases the demand on batterypower. You can prevent the device fromautomatically downloading new maps. See"Maps", p. 87.● If the signal strength of the cellular networkvaries much in your area, your device must scanfor the available network repeatedly. Thisincreases the demand on battery power.If the network mode is set to dual mode in thenetwork settings, the device searches for theUMTS network. If it is not available, the deviceuses the available GSM network. To only use theGSM network, press , and select Tools >Settings > Phone > Network > Networkmode > GSM.● The backlight of the display increases thedemand on battery power. To change the time-out after which the backlight is switched off,press , and select Tools > Settings > 17 Useful information
