MacBook Pro Battery suddenly dying

Hi all,
I've had my MBP now for just about 3.5 years. It's a 2.4 GHz C2D, 4GB RAM mid-2009 model. It's currently running 10.8.2 (I keep up-to-date quite religiously).
Anyhow, my battery life has always been quite decent -- lasting variably between just under 2 hours and 3.5 hours. I try to be quite cognizant of what is "good" for the battery by avoiding constant charging and occasionally letting it drain to 0% in order to recalibrate. In the last several weeks, it's "condition" appeared to start deteriorating..at least according to Mac OS X's discretion, and changed to "Replace Soon." This worried me, so I installed the "Battery Health" app and consulted iStat Pro to see what they were telling me; both indicated that my battery was still an upper 80% in health.
This brings me to yesterday. I had taken my MBP all over with me throughout the day with no issue, and then brought it back to my apartment that evening. I left it charging and took a 1 hour nap. When I woke up, the charger indicated green but the battery indicator was flashing when I clicked it; when I opened my computer, it had a "charged" symbol but was at 0%. The condition had also suddenly changed to "Replace Now." In other words, if I disconnect the charger at all, the computer immediately dies.
Do y'all have any advice about what could have caused this so suddenly and dramatically, and whether it's at all remediable without getting a battery replacement (this model doesn't let you easily replace the battery)? To speak the obvious, it's incredibly inconvenient and ultimately untenable, but I'm not sure if I can hold Apple at fault since it's obviously OOW.
Thank you!

ramoram3 wrote:
Thanks for your response, Csound1. I am confused, however, at your assertion that Li-ion batteries need not, and even should not, be recalibrated by draining them (as opposed to Nicad). This really flies in the face of what I have learned, heard, and read over the past several years. Note just a couple sources:
https://discussions.apple.com/thread/2411282?start=0&tstart=0
http://support.apple.com/kb/HT1490
I am interested in hearing your (and anyone else's) viewpoint on this matter. Thanks again for the responses!
Here some information about prolonging (or maximizing) the life of a Li-ON or Li-Poly battery

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http://support.apple.com/kb/ph14204
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http://support.apple.com/en-us/HT201257
Can you run EtreCheck and post the report here please?
EtreCheck: https://discussions.apple.com/docs/DOC-6173
Best.

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Hey,
as others reported my Macbook Pro 17" also died yesterday !
I just worked like I normally do and had about 80 % batterie life and then suddenly the Macbook Pro was off. No shutdown, no warning just stopped working ! I pressed the power button, the start sound came I saw the Apple and again it turned itself of, just like if you run on power cord only and suddenly remove the power cord. I tried again and it also turned itself of even before the grey apple appears. So I removed the batterie for about 10 sec. put it back in and ... now it is working for the moment. But what the **** was that ? Any explanation ? It happened between 92 % and 83 %.
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I have it for about 15 month and use it everyday and really like it cause of the ability to run workstation tasks on the street, but this batterie issue really argues with me.
Battery Information:
Model Information:
Serial Number: SMP-ASMB014-XXXX-XXX //I changed that !
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0202
Cell Revision: 0100
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Battery Installed: Yes
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Voltage (mV): 11451
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Regrades Snoop1990

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Model Information:
Serial Number: SMP-ASMB014-XXXX-XXX // I changed that !
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): 1358
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 3858
Health Information:
Cycle count: 506
Battery health: Good
Battery Installed: Yes
Amperage (mA): 3320
Voltage (mV): 11905
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Regrades Snoop1990
Message was edited by: Snoop1990 (I changed the serial number)

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If you have more than one user account, you must be logged in as an administrator to carry out these instructions.
Triple-click anywhere in the line below to select it:
syslog -k Sender kernel -k Message CSeq "Previous Shutdown" | tail | open -f -a TextEdit
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
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http://www.apple.com/support/macbook_macbookpro/batteryupdate/
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i am sorry i not good speak english

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