Macbook shutdown without any warning after 40%, when run on battery.

Question

Hello,
My Macbook when run on battery after 40% shuts off without a warning. Is there a way to avoid it? Is there a setting in the battery preferences where I can change to avoid shut down?
Battery Information:
Model Information:
Serial Number: DP-ASMB016-370e-4db1
Manufacturer: DP
Device name: ASMB016
Pack Lot Code: 0002
PCB Lot Code: 0000
Firmware Version: 102a
Hardware Revision: 0500
Cell Revision: 0200
Charge Information:
Charge remaining (mAh): 2496
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 4276
Health Information:
Cycle count: 142
Condition: Good
Battery Installed: Yes
Amperage (mA): 1488
Voltage (mV): 12281
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 60
Disk Sleep Timer (Minutes): 180
Display Sleep Timer (Minutes): 45
Automatic Restart On Power Loss: Yes
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): 60
Disk Sleep Timer (Minutes): 180
Display Sleep Timer (Minutes): 45
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: Yes
Charging: Yes
If you can suggest me with the above problem will be of great help. Thank you in advance.

Answer 1

Same issues here:
- When powering the MB on the battery, the MB can go off suddenly without warning, usually at about 20% but, since it started about 2 months ago, it occurred also at 7%, between 30 and 40% and even 70% once… It occurs every time when on batteries. And every time, if I start the computer again, it will shut down suddenly without warning after a few seconds/minutes. When back on mains, it can be powered on normally. It does not go to sleep, it's a complete and sudden power off without warning.
- The battery at about 173 cycles sees its capacity dwindling way too much (it's been dwindling since day one, but it's going down faster and faster, the graph since November 2007 in MiniBatteryLogger is edificatory). The capacity right now is between 2900 and 3460 depending of the feel of the day. It's been calibrated regularly since day one in July 2007. Note that the capacity dwindled from its original capacity but never went higher than this value even if along the way it recovered sometimes more capacity.
I have tried all the tricks from calibrating a little bit more often, reseted the SMC, even a complete system reinstall (that I wanted to do anyway as I had to get rid of the evil spotlight bug). All this to no avail.
So what? :-/
Model Information:
Serial Number: DP-ASMB013-3629-1bbc
Manufacturer: DP
Device name: ASMB013
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0300
Cell Revision: 0200
Charge Information:
Charge remaining (mAh): 3320
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 3412
Health Information:
Cycle count: 173
Condition: Check Battery
Battery Installed: Yes
Amperage (mA): -1
Voltage (mV): 12411
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 0
Display Sleep Timer (Minutes): 5
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): 5
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 1
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: Yes
Charging: No