My battery has this problem as when I charged it fully to 100% and leave it to sleep during night time, when it's morning.. the battery falls to 76% ... which is super duper fast.... On average I would have to charge eveeryyday, I switch off every neccessary network and all but this is still it. Are there any other ways to help keep the battery life?? Please advice thanks =)

Oh and btw how many hours should I charge the first time I use the iphone ?????? Like an avergae phone is 8 hrs? for iphone 3gs ?

u're using 3GS too??? hrmm do you tink they have some battery prob or wat??? since we're all using the same OS right