Mac book pro battery only reports 3000mAh on battery.

Question

My works 15" mac book pro says battery capacity is 3300mAh. I've tried calibration of the battery. I turned off power saving and left it switched on to run down battery but laptop won't power on again when the battery goes flat even when connected to the mains until its been charging for about 10 minutes at which point it says its got 1000mAh (1/3 charged). I'm sure it used to power on immediately from flat if on mains power.
The laptop is about 2 1/2 years old and currently my main use is at home connected to power but occasionally I need to use it on battery when it lasts less than an hour. I do have an apple care pack for it (not registered it yet! I know, its just been one of those things I've never got round to doing).
Can anyone suggest what I do next?
Chris
Battery Information:
Model Information:
Manufacturer: Sony
Device name: ASMB012
Pack Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 0110
Hardware Revision: 0500
Cell Revision: 0303
Charge Information:
Charge remaining (mAh): 1008
Fully charged: No
Charging: No
Full charge capacity (mAh): 3304
Health Information:
Cycle count: 315
Condition: Replace Soon
Battery Installed: Yes
Amperage (mA): -1755
Voltage (mV): 9844
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 0
Wake On AC Change: No
Wake On Clamshell Open: Yes
Current Power Source: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: No
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: No
Charging: No

Answer 1

Your battery is on its last legs and needs to be replaced soon, as System Profiler is telling you. AppleCare won't cover it. Batteries are consumables, and you've consumed yours.