Battery health check

Discussion in 'MacBook Pro' started by thefoo, Oct 13, 2009.

  1. thefoo macrumors member

    Jun 9, 2007
    My MBP 2.2Ghz was bought two years ago. One year ago it developed a fault in which is suddenly switched off when running on battery. The supplier gave me a new battery.

    Today while I'm not seeing the power die suddenly it does run out of charge real quick. istatpro shows my health now less than 50%. Here's from the profiler:

    Battery Information:

    Model Information:
    Serial Number: Sony-ASMB012-382b-755b
    Manufacturer: Sony
    Device name: ASMB012
    Pack Lot Code: 0001
    PCB Lot Code: 0000
    Firmware Version: 0110
    Hardware Revision: 0500
    Cell Revision: 0303
    Charge Information:
    Charge remaining (mAh): 2311
    Fully charged: No
    Charging: No
    Full charge capacity (mAh): 2758
    Health Information:
    Cycle count: 113
    Condition: Check Battery
    Battery Installed: Yes
    Amperage (mA): -2067
    Voltage (mV): 11751

    Is there any way of improving the situation? I did try a calibration but after leaving it in sleep mode for > 24 hours it was still sleeping when I resumed - it showed 14% remaining power then dropped to 8% after one minute before I plugged the power back in.

    Is the health something I can improve or am I resigned to needing another new battery?

  2. LAS.mac macrumors 6502

    May 6, 2009
    Did you follow the calibration process? Drain completely - let it cool - charge completely - cool.
    When did it show 14%?
  3. thefoo thread starter macrumors member

    Jun 9, 2007
    I let the computer drain all battery such that it got to 0% battery then went to sleep. That was about 0830, at 0730 the following day the sleep light was still "throbbing" so I opened the laptop and the battery readout said 14% before dropping to 8% a minute later. I had to use the machine so I plugged in the power.

    Yesterday AM after posting I let it drain once more but last night when I went to use it, again 14% left open waking it up.

    Looks like I'll need to drain it, then wake it up and repeatedly drain it until it won't wake up any more, then leave it a few hours. Very annoying, but still doesn't tell me if the battery itself is beyond further use.
  4. snaky69 macrumors 603

    Mar 14, 2008
    Apple states that a battery should net your 80% health after 300 cycles. Which isn't your case. I have 100 cycles and my health is at 89%.

    Ring apple up, you could probably get a new battery out of this.
  5. thefoo thread starter macrumors member

    Jun 9, 2007
    A follow-up.

    My battery has degraded still further. Having switched off (shut-down) the macbook with 20% charge remaining this morning, I came back and found it completely dead this evening, requiring mains to boot.

    Giving up I called Apple earlier this evening and gave them the figures from the profiler. After checking with 2nd line support I was told I was in luck - I qualified for a new battery to be shipped to an address of my choice. This will be my third battery...

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