MBP Shuts off at 51% battery power

Discussion in 'MacBook Pro' started by LoneWolf121188, Apr 18, 2008.

  1. LoneWolf121188 macrumors 6502a

    Jun 7, 2007
    Longmont, CO
    I've used my MBP on AC power virtually it's entire life. Now that the weather is getting nicer, I've been using it outside on the quads every now and then. The problem is, it consistently shuts down without warning at 51% battery life. I'm typing along, when all of a sudden BAM it's turned off. Not even like asleep or going through the normal shutdown process, but like what happens if you pull the plug on a desktop. As I understand it, Li-Ion batteries don't have memory issues...so what's the deal?
  2. bcaslis macrumors 68020

    Mar 11, 2008
    Open System Profiler and look in the Power section. If you battery shows a low percentage of available health then it's probably failing and needs to be replaced.
  3. chrisbeebops macrumors regular

    Jun 8, 2007
  4. LoneWolf121188 thread starter macrumors 6502a

    Jun 7, 2007
    Longmont, CO
    I do have an A1175, but my SN ends in YF3A.

    The problem with the calibration article is that it doesn't actually go to sleep. It just shuts off.

    I'll try the battery logger.

    iStat reports my health at 72%. Here's my System Profiler report. I'll point out that a cycle count of 80 sounds pretty low for a laptop that I've had for almost a year...

    Battery Information:
      Model Information:
      Serial Number:	Sony-ASMB012-36a7-2745
      Manufacturer:	Sony
      Device name:	ASMB012
      Pack Lot Code:	0003
      PCB Lot Code:	0000
      Firmware Version:	102a
      Hardware Revision:	0500
      Cell Revision:	0303
      Charge Information:
      Charge remaining (mAh):	3745
      Fully charged:	No
      Charging:	Yes
      Full charge capacity (mAh):	4076
      Health Information:
      Cycle count:	80
      Battery health:	Fair
      Battery Installed:	Yes
      Amperage (mA):	414
      Voltage (mV):	12578
  5. forafireescape macrumors 6502a


    Jan 16, 2008

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