i have the black berry curve 9300. i leave my phone to charge all night and when i get up it has full battery, by 12oclock i have 2 bars of battery left and my phone just goes off, after a couple of minuites i take the battery out put it back in and thne phone comes back on, stays on for about 30seconds then goes off again, so i leave it a couple of minuites again switch it on and my battery is on red and it says'battery drained shutting down', so i leave it off until i get home and when i put it on charge when it comes on im back up to 2 bars! someone please help me because this is really annoyingg!!