MacBook Pro woes

[Veljo]

This has come up out of nowhere, but for some reason whenever my battery reaches say 70%, or 64%, or something random like that, my MacBook Pro will instantly turn off. No sleeping, no warning, just instant off. It will then not turn on unless I plug it into a power source.

Now it will work perfectly fine all day off a power source, but I can't use it more than half an hour without it shutting off on me. It's not even dead.

Any ideas?

[Giaguara]

What's the cycle count for the battery? (From System Profiler)

Has it been recalibrated recently/at all?
I'd say try calibrating it and reset PRAM and SMC/PMU (or however they call it for your model) at the appropriate time for the recalibration....

[Satcomer]

Sounds like the battery took a dump, these things sometimes happen. You best bet would be either (if your Mac is still under warranty) and call AppleCare or get a new battery from somewhere.

[Veljo]

Charge Information:
Charge remaining (mAh): 4719
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 4880
Health Information:
Cycle count: 244
Battery health: Good
Battery Installed: Yes
Amperage (mA): -1645
Voltage (mV): 11722

[Giaguara]

Try recalibrating it. With that cycle count it should still work better than you describe.