Yet another battery issue on macbook pro 15''

Okay, so before posting this I searched the community for battery problems same as mine and I found some, but they weren't suggesting any solutions other than replacing battery. I want to consider changing battery as a worst-case-scenario, so I'll re-ask a question with some more details about the problem. I would be really glad if somebody can help me solving it in any other way.
I have a macbook pro 15'' purchased on july 2011, and the battery is at 180th cycle. The problem came out of nowhere, yesterday I sit down in front of my computer and it did not open, so I plugged it in in case the batteries are emptied somehow. Then it was opened, but I got a warning like "date has been reset to pre-2008" (something like this) just after seeing desktop. Then I noticed the magsafe light is green, and saw "not charging" notice next to the battery indicator. It also says "condition: change now". Then I looked at the properties of the battery and saw it has %92 percent of charge already. So I unplugged the magsafe, and boom, my computer just went down as it has no battery.
The funny part starts here: I could not again start up the computer by just pressing the power button, so I had to plug in the magsafe, and as soon as I plugged it in my computer started without pressing it. after booting I shut down normally, it did stay shut down until I unplug and re-plug - it started automatically again! and it just crashes whenever I plug it off.
So upon my research, I learnt that this might be because of SMC, so I reset it as instructed but the problem persists. I also booted from one of the dvd's that came out of the box and perform a hardware test, and it said: "Alert! Apple hardware test detected an error. 4XXX/1/40000000: ´®'^! Battery" (the symbols were not exact, but they did not mean anything to me). And now I continue to use my computer plugged, without any other weird behaviour.
So, can anybody have any advice for this? thank you very much in advance.
ps1: I purchased the mbp in one of the apple stores in US and I use it in Turkey now.
ps2: I can make lots and lots of conspiracy theories from the fact that I bought my computer in 15th july 2011 and it broke in 19th july 2012

I am sure you also tried resetting PRAM?
My macbook's battery also died suddenly without warning, so it is possible for batteries to die suddenly.
I know that you are looking for a different answer, but battery replacement is probably the only solution to your problem. If you are lucky, it is possible that your battery connector is loose due to vibrations or something like that.
If it was a software problem, your hardware test would not have given you an error.
BY the way, the "date has been reset to pre-2008" error message makes it sound like your CMOS battery is dead. The CMOS battery is pretty small, and cheap. It is different from your main battery.

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