Some measurementes. I have BT always on and hidden although during these tests, it wasn't connected. Latest FW. Only widget using internet automatically is OMWeather, which updates itself when connected every 4 hours. I log the current mAh capacity reported by 'hal-device bme' every 10 mins. When the device is in standby, the value does not change but it does not matter, since as soon as I unlock it, it is updated. I've measured these standby currents during the night (6-8h) when I did not move the phone or do anything with it. WiFi connected: 15 mA -> ~80 h 3G connected: 20 mA -> ~60 h 3G + skype connected: 80 mA -> ~16 h 3G + MSN (Haze) connected: 120 mA -> ~10 h
conclusion::: BATTERY DOESNOT RUN OUT BECAUSE 3G OR 2G IS TURNED ON, BUT BECAUSE PROGRAMS LIKE SKYPE AND GTALK USE IT CONTINOUSLY TO SEND OUT KEEPALIVE MESSAGES.