my focus does well when I have everything shut off except for text and phone calls, and battery saver turned on. I have no problem manually checking my mail and facebook/twitter. I am sure once you start seeing dual core phones in the future, that battery life will improve.
I wonder if those that have battery issues (I have small issues, nothing big though) because they are using their phones more. I know I am. I love bing vision and checking the people hub, etc...
I also wonder if I have battery issues because my wireless router is going funky and my Focus continually has to try to make a connection...
that 100% what it is... MANGO did not do ANYTHING to the battery... lol its funny how people seem to think it did.
the reason it drains more, is more live tiles , more location apps , more features.. WIFI , BT , ect...
even if YOU dont use your phone more, the phone uses itself more. lol