Nokia 5800 Tips, FAQ, How to

Sometimes you may have to stop talking with your friend or watching videos with your phone as low power of your battery. It is more inconvenient if you are in travel and have no alternative battery. Here are some tips to make your phone battery last as long as possible when using telephone.
Do not switch the phone off. As switching a phone on uses far more battery power than simply leaving the phone on.
Shut down unnecessary applications.
Turn down the 5800’s screen brightness to the lowest acceptable level.
Switch off your 5800’s screen when not in use.
Use headphones instead of speakers when listening to music or watching movies.
Avoid using the camera flash unnecessarily.
Use 2G instead of 3G.
Switch off Bluetooth and/or Wi-Fi.