My MacBook Pro is starting to randomly shut off again, something it did back in August for a short period of time. It did it to me three times last night, once in Orlando and three times at the airport in Seattle. It's seriously annoying.
As I've said before, I'd really like to get a solid three years out of the laptop, because frankly it's pretty adequate in every way for the things I need it to do. OK, it would be nice if it could use 4 gigs of memory so Parallels could have 2, but other than that it's totally adequate.
The battery is only lasting about two hours these days, after more than 250 charge cycles and health around 75%. I still wonder if it isn't the battery that's influencing the issue, but as I mentioned in August, it powered off once with no battery in. I think that the power management stuff is still influenced by the battery, or last batter in, in some way.
Regardless, I'm just not ready to replace it. Hopefully the problem will just go away like it did last time.
A friend of mine had this problem with his MacBook. It wasn't a Pro, but I would imagine his solution would work for you.
He said this worked for well over a month before he took it to the "Genius Bar."
Unplug the AC, take out the battery, hold the power button for 20 seconds, and replace the battery.
Check it out.