Ive had my s3 for a few weeks and at first it was fine but then it started to drain the battery pretty quick so i installed battery defender and tried to minimise the batteries use in any way i could.
That seemed to work for a day but now when its charging the battery goes down, I've tried two batteries and the wall charger and usb and neither seems to make an improvement.
Charged over night for 9 hours and only charged from 2% to 78%.
Phone was in my pocket for an hour and battery dropped 25%
I have done a reboot of the phone and installed battery defender again but not much difference.

Phoned vodafone and they are replacing the handset?? could this be the problem.