I am a heavy skype user and tend to get a fair number of messages. I always leave WiFi and 3G on and browse the internet from 1 - 3 hours a day. I have e-mail set to poll every half hour and last weekend I had vnc viewer running most of the time.

I have never had a case where I "needed" to charge during the day. The only time I have done so is when I wanted to test the legacy charger converter.

Sorry to be boring, but I have no problems to report.