I have a VPCEA1S1E and I use the hibernate function most of the time when I switch off in the evening. The next day I have only dropped about 5% battery. I have read about your problem before and it has been suggested that it could have something to do with some of the pre-installed sony software. I uninstalled most of mine apart from a few essential apps. I dont know if this is the cause as I didnt test it out before I uninstalled the software.
