So, test 1:

- Wifi disabled, 3G enabled, permanent internet connection, skype and gtalk accounts enabled, three times viewing mail, three times consulting a web page (less than 5 min browsing in total).
- A constant slope seen in BatteryGraph app.

-> From ~8:50 to 11:36, battery from full (~96%) to a 54%.

Other details, kernel overclocking at "ideal" conf, 2 desktops, widget of calendar, three contacts in desktop (saying if they are online or not with the green dot), two widgets-like indicating the internet IP and the battery percentage, brightness to the 3 position, display almost all the time disconnected. Mail autocheck each 30 min.

Well, this is a behaviour not surprising for me based on my past experience. However, perhaps being always connected with the two IM accounts makes a big difference.

Test 2 will be the same with the two IMs disabled.

(now, at 11:42, a 52%)