Macbook Pro wont run off of battery power.

Hi, I love my macbook pro but suddenly it stopped working off battery power. The system and battery report a full charge but as soon as the power cord is removed my mac dies!
Here are the specs from system profiler:
Battery Information:
Model Information:
Serial Number: SMP-ASMB014-362f-7d2
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0202
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 4662
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 4687
Health Information:
Cycle count: 317
Battery health: Good
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 12546
Has anyone else had this problem? Do you think its the battery or my mac which is faulty?
I realize that Apple will have to look at my mac but I want to know whether or not I am looking at having my mac away for repair.
Any advice will be appreciated,
Many thanks
Message was edited by: Pangemw

Welcome to the Forums!
Your battery is on the way out. You might be able to get a new battery for free under AppleCare. There are known issues with Sony batteries (yours is one) that have been acknowledged by Apple. They extended the battery warranty to two years for Core Duo machines, but lots of users with C2D machines have also gotten free replacements. Details on that program are here:
http://www.apple.com/support/macbook_macbookpro/batteryupdate/
The catch is, Apple spec is that a battery maintain 80% health for 300 cycles, and your cycle count is 317. 80% health for you would be a full charge capacity of 5000 mAh, and you are under that by a bit. Apple considers batteries to be 'consumables' and thus they aren't covered by the warranty if they fail due to 'normal use'. Nevertheless, others with your symptom and up to 400 cycles have reported getting free batteries.
So, I would contact AppleCare or visit an Apple Store. Be polite but firm. It may help to bring in a printout of the linked page, as some Apple 'geniuses' are apparently unaware of this issue.
Hope this helps...

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I have an update regarding this issue. Since receiving my new MacBook Pro, I have calibrated the battery 3 times. Here are my findings of each calibration when the battery reaches 0% charge:
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<Edited by Host>

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Macbook Pro wont run off of battery power.

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