I installed 3.0 GM yesterday and suddenly my battery life seems to have improved drastically. Usually I would get 1 - 1.5 days out of the battery. But since the upgrade yesterday evening (12h ago), the battery indicator is showing still over 90% (rough estimate as I only have the small battery symbol) left.
(WiFi and 3G switched on . Location services switched off.)
(WiFi and 3G switched on . Location services switched off.)