i seem to be suffering from a similar battery drain problem, haven't yet investigated the cause but may do so tonight, turned on my phone yesterday morning around 10am, by 2pm it was down to a red battery indicator, i hadn't used the phone much only some light web browsing - ie 15-30 minutes tops, the phone had been connected to local wifi for most of this time. At 2pm I recharged the phone for the rest of the day made maybe 20 minutes of phone calls and also a bit more light browsing 15 minutes and the battery was almost drained come 10pm
obviously something is killing the battery just not sure what, this was probably the worst battery life i've experienced since receiving the phone