I'm having the exact same problem as deled10
I bought 9300 curve like a week ago and
I charged it for like 10 hours straight to get it full
but when i brought it to school, the back of the battery
was like burning -_- and it only lasted for like 5 to 6 hours
and it shut off.
I closed and turned off every apps except SMS and MSN
i had it silent and the backlight is only 20% which should save the battery.
Can anyone explain why this is happening