Mac Forums

i bought an iphone 4s 64 gb on boxing day, the battery drain on this has been terrible. I let the battery fully drain then charged it to 100% overnight as i have done with my previous iphones but the battery on this one only lasted 7 hours fully charged!! majority of this time was with the phone in standby.

I have been searching on the internet on tips for the battery and noticed that the calendars on the notifications center to be turned off as this is always searching, this seemed to do no good.
I then rung apple up, the man told me to let the phone die down to 0% then charge up to full over the next few days do this a few times and this should callibrate the battery. After 2 times of doing this it seems to be little help.

Have any of you guys had this problem?
if so how have you fixed it?