Nokia 7610 Supernova
Physical damage and battery backup

I have purchased a nokia7610 supernova last November. But I'm totally dissatisfied the battery backup of thye mobile as thecompany claims a standby of 2days in comparison it stand only for a day. and even the outer cover of the mobile is very light & it has been cracked with a small damage. If possible then please mail me that the physical damage is in under warranty or the outer body could be changed under warranty.