So I spoke to the tech guy today and he is sending the problem upwards. During the last few days I've taken a few screenshots of my battery that I sent to Apple. As I've said before I get between 20 and 24hrs out of my phone with very light usage, I almost never use 3G. Most of my use is listening to music, surfing on wifi and checking settings/viewing photos. A few phonecalls and a few mails/messages. I have very conservative settings, no push, very few notifications, no reminders, no bluetooth etc.
I have only done full charge cycles since I got the phone. Use untill dead, then charge to 100%.
The following picture is from tuesday, I used the phone close to my normal use. not heavy using at all. Maybe 5 mins of 3G in there, rest is prob 50% wifi suring and rest music/browsing photos/settings apps.
My point has always been that usage does not really convey the problems with the battery as it is in standby-mode that the real killer is. To prove my point I decided that after charging my phone on tuesday I would barely use it untill talking to the tech guy today. So after unplugging it from the charger around 20.00 on tuesday I took this picture on wednesday around 10.00.
Barely touched the phone and it has dropped 61% in battery overnight.
Then took this picture just now after talking to the tech guy for alittlewhile and his diagnosticstool telling him about 4hrs usage and 23 hrs standby:
I have gotten my standby time up to around a day by almost not using it at all. Most of those 1hr39mins was in settings/photos and making one or two 1min calls (present call excluded ofc). No surfing, two mail sent.
I have now decided to try to reformat/reset settings and without installing or touching any settings see if I can "fix" my phone. Will report back if it works in any way. Also have a friend getting a 4S phone soon, if he does not have the problem I might try to reset my phone to his backup and see if it fixes it.