MBPro Turns Off Shortly After Being Unplugged

I got my mac August 2006 before my first year of college. Everything has been working pretty well with it except that for the last year or so.
This is my problem:
*When it is plugged in, everything is fine, it charges up to 99%. But when I unplug the power, after 10 minutes or so it just shuts off even though the battery life will say 97%.* This is so frustrating because I can't use it unless I am by an outlet. I know that keeping the MBP plugged in all the time is bad for the battery but I have had no choice. *What could I do to fix this or what is wrong with it?*
AC Power:
System Sleep Timer (Minutes): 14
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 14
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 5295
Remaining Capacity (mAh): 5254
Amperage (mA): 0
Voltage (mV): 12391
Cycle Count: 26
AC Charger Information:
Connected: Yes
Charging: No
Hardware Configuration:
UPS Installed: No

I FIXED MINE!!!...You see in your profile where it sez..."0-mA"...
mine said the same thing...meaning there's no current getting to the
battery...(I just knew something fishy there). I took my battery out,
and inspected the pins VERY CLOSELY. Looking down at them from above,
each little slot there are TWO pins, one on the left, one on the right.
I took a small safety pin, and GENTLY pulled these pins in the battery
towards the center of each slot...
Essentially you're "helping" it make better contact when the battery is
seated into the machine.
Be careful though...it looked to me like pins could very easily get "pryed
open" too far, and then your battery might not seat at all, or at best, you'll
mash the pins when you put it back in.
I swear to god that's all I did. After round & round, pulling my power plug
only to watch my machine go dead...I kept seeing a good charge on my battery...
ALL green LED's on the battery...etc...calibrating the battery-blah-blah-blah...
It wouldn't even boot with an Apple Hardware disc.
Now I can pull the plug till my face is blue & it's like the energizer bunny!
The PINS my friend...the pins!

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