ok i have not let my battery go under probably 30% but it feels like my battery does not last a long time....i really doubt i could surf the web for 6 hours or whatever they say. how can i tell if i have a messed up battery? today it seemed to do pretty good but i barely used it. this morning it was at about 70 or 75% and now at 6 pm its at about 35-40% and im starting to charge it....i didn't use it more than 2-3 hours though. it was always on but doesn't it save battery b/c it is in "sleep" mode?