MacBook shuts down without warning

Thanks Lyssa,

You've actually suggested solutions on this same problem, but since they did not work, I thought I coming at it from another angle it might help.

Battery Information:

Model Information:
Serial Number: DP-ASMB013-3526-3e9
Manufacturer: DP
Device name: ASMB013
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0300
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 4116
Fully charged: No
Charging: No
Full charge capacity (mAh): 4571
Health Information:
Cycle count: 154
Condition: Good
Battery Installed: Yes
Amperage (mA): -1539
Voltage (mV): 11133

System Power Settings:

AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 20
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): 15
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 5
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes

Hardware Configuration:

UPS Installed: No

AC Charger Information:

Connected: No
Charging: No

I think I've reset the SMC for 15" MacBook. I found many different way to to do it and hopefully chose the one for the 15" MacBook.. I also did the battery update 1.3 awhile ago but just saw that was for MacBook Pro's, so I just did the 1.2 update. I have another 1.5 hours to re-charge the battery fully to see if this worked. Thanks for your quick answers/suggestions today.

Thanks, but just to clarify, I take out the battery and unplug the power cord, then hold the power button down for 5 seconds even though nothing will happen because there is no power source? If no ones told you today, you rock.