MBP shuts down when not plugged into wall

hey there,
was wondering if anyone has experienced this paritcular problem or knows what to do...
I've had my MBP for about a week now, and I just notcied a day that it randonmly shut down... but it was only once, so I though it wasn't that big of a deal. I left the computer charging all night ast night, and when I tried to start it without it being connected to the wall, it wouldn't boot. I checked my batter power, which is 89% full, reset the PRAM and reset all of my premissions, but it still shuts off everytime the DC adapter isn't plugged in. I aso ran the memtest program for RAM which someone on this forum had suggested, but it says that everyhting is A-Ok... What do i do? Somebody, please help!

I am having the exact same problem as you! The computer will run all day plugged into the wall, but after I remove power, it shuts down within 10-15 minutes. It usually refuses to start up again at all until you plug it back in, even though the lights on the battery indicate full charge. After plugging in and restarting, OS X still reports full battery charge. I have tried resetting the PRAM and PMU, and also cleaning the magsafe connections. Apple Hardware Test reports no problems.
I added a stick of Techworks memory from OWC when I got the computer. Other people with sporadic shutdown problems seem to be pointing to bad memory as the culprit. I don't know if that applies here though, because the problem only happens on battery power. Also, I installed the memory as soon as I got the computer and it's been working fine for almost a month now. My shutdowns didn't start until a couple of days ago. I think i will remove this extra stick of memory and see if the problem goes away, just in case. Maybe you should try removing the additional memory you got from the apple store to see if you got a defective piece.
I haven't tried calling apple yet regarding this. Have you? I'm curious to see what they say about it.
MacBook Pro 2.0GHz/2GB Mac OS X (10.4.5)

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Message was edited by: Biz Bizzle

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MacOSG Founder/Ambassador  An Apple User Group  iTunes: MacOSG Podcast
Macsimum News Associate Editor  Creator of 'Mac611 - Mobile Mac Support'

MBP shuts down when not plugged into wall

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