I've got the 16gb 3gs and it's a week old today. I charge it every night and get average usage from the battery, but it has never said the battery is 100%. When I go into settings/general/usage the 'time sine last full charge' is always blank, and a note under it says 'Usage times will be shown after iphone is fully charged'. How do I 'Fully Charge' the phone then? Thanks for any help!