MacBook Pro shuts down when unplugged

Hi Ryan,

ryansebiz wrote:

I have a late 2008 MacBook Pro work computer. Here's the sequence of events:

1. I fully charge the battery
2. I unplug the Mac from the power cable
3. The Mac immediately shuts down

Before unplugging the Mac, I press the battery power indicator button and all lights are green. When I unplug the Mac I press the indicator button again and only one light is green.

I've tried resetting the PRAM, SMC and even bought a new battery but the problem persists. Here is the System Information.

How can I get my MacBook Pro to stay powered on when not plugged in?

System Profiler shows you have 195 cycles on this batt and says "Service Battery" so I'm not sure if that's the old batt or you bought a used one, but either way, it looks like that batt is nearly dead. If you have a new/different batt, install it, give it a full charge, and post System Profiler info for that one.

Also, have you tried different power adapter and/or tried your power adapter on a different MBP?