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Lion - Horrible MacBook Pro Battery Life

550316 Views 2,725 Replies Latest reply: Dec 5, 2013 6:55 AM by Nickofari RSS Branched to a new discussion.
  • keybounce Level 1 Level 1 (15 points)
    Currently Being Moderated
    Jan 29, 2012 1:21 PM (in response to MF1559)

    Ok, system profiler can tell me my battery capacity. Is there a command line way to determine this?

     

    My iBook G4 says it has a full charge of 2740 mAh. Granted, it's several years (and 190 cycles) old, but how can I tell what it should be?

     

    Dang, this machine used to get 2:30 on batteries a year ago; now it claims 1:20. I can at least blame that on age of my machine :-).

  • Bob Jacobson Level 1 Level 1 (115 points)
    Currently Being Moderated
    Jan 29, 2012 3:42 PM (in response to keybounce)

    Ok, system profiler can tell me my battery capacity. Is there a command line way to determine this?

    Install coconutBattery, an open source battery monitor.  It reports your battery's capacity and charge:

     

    http://www.coconut-flavour.com/

    MacBook Pro, Mac OS X (10.6.8), Apple User Since 1981
  • Bob Jacobson Level 1 Level 1 (115 points)
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    Jan 29, 2012 3:44 PM (in response to keybounce)

    What? Draining your battery increases its life? I thought repeated charging/discharging destroyed batteries.

    Discharging your battery and then recharging it resets an internal solid-state device that monitors and optimizes your battery's charge capacity.  It doesn't in itself lenghten your battery's life, but it makes it operate more efficiently which has that result.

     

    http://support.apple.com/kb/HT1490/ and http://www.apple.com/batteries/

    MacBook Pro, Mac OS X (10.6.8), Apple User Since 1981
  • Csound1 Level 7 Level 7 (32,320 points)
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    Jan 30, 2012 12:35 PM (in response to Bob Jacobson)

    Bob Jacobson wrote:

     

    What? Draining your battery increases its life? I thought repeated charging/discharging destroyed batteries.

    Discharging your battery and then recharging it resets an internal solid-state device that monitors and optimizes your battery's charge capacity.  It doesn't in itself lenghten your battery's life, but it makes it operate more efficiently which has that result.

     

    http://support.apple.com/kb/HT1490/ and http://www.apple.com/batteries/

    Neither of the articles you reference agree with what you posted, the closest is this:

     

    "The battery has an internal microprocessor that provides an estimate of the amount of energy in the battery as it charges and discharges. The battery needs to be recalibrated from time to time to keep the onscreen battery time and percent display accurate and to keep the battery operating at maximum efficiency. You should perform this procedure when you first use your computer and then every few months after that. If you normally leave your Apple portable computer connected to AC power and very rarely use it on battery power you may want to perform this process once a month. The website www.apple.com/batteries has more helpful information regarding batteries and offers an iCal calendar to remind you to calibrate your battery"

     

    Once every few months to keep the metering in sync with real life (as if we didn't already know that it is just an estimate) and it does nothing at all to the battery, the recalibrating doesn't "make it run more efficiently" it simply recalibrates the metering systems idea of how much is left in the battery.

     

    Glad to see that you are still on form.

  • Bob Jacobson Level 1 Level 1 (115 points)
    Currently Being Moderated
    Jan 30, 2012 1:07 PM (in response to Csound1)
    The battery needs to be recalibrated from time to time to keep the onscreen battery time and percent display accurate and to keep the battery operating at maximum efficiency.

     

     

    When you're capable of reading English, get back to us.  Stop wasting our time.

     

     

    PS I've now seen mulligans missus and you pull this team-tag bullying in two -- or is it three? a dozen? -- other forum conversations.  Always disparaging people looking for solutions.  Except that Apple's not that stupid, I would assume that the two of you are on its PR payroll as ideo-thugs.  I guess you do it for kicks.  Stop it.

    MacBook Pro, Mac OS X (10.6.8), Apple User Since 1981
  • Csound1 Level 7 Level 7 (32,320 points)
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    Jan 30, 2012 1:08 PM (in response to Bob Jacobson)

    Repeatedly discharging Lithium Ion batteries until they are flat will in time destroy the cells, you do a great disservice to others by recommending this procedure, but such is life, I at least know to ignore you.

  • Bob Jacobson Level 1 Level 1 (115 points)
    Currently Being Moderated
    Jan 30, 2012 1:12 PM (in response to Csound1)

    Don't put words in my mouth.  What crud.

    MacBook Pro, Mac OS X (10.6.8), Apple User Since 1981
  • Csound1 Level 7 Level 7 (32,320 points)
    Currently Being Moderated
    Jan 30, 2012 1:11 PM (in response to Bob Jacobson)

    Bob Jacobson wrote:

     

    Don't put words in my mouth.  What crud.

    My thoughts exactly.

  • Bob Jacobson Level 1 Level 1 (115 points)
    Currently Being Moderated
    Jan 30, 2012 1:14 PM (in response to Csound1)

    Csound1, you have a peculiar ability to make people who communicate with you feel dirty after the exchange.  I note this is not my opinion only.  Please don't communicate with me again.  You demean the conversation.  Bye.

    MacBook Pro, Mac OS X (10.6.8), Apple User Since 1981
  • Csound1 Level 7 Level 7 (32,320 points)
    Currently Being Moderated
    Jan 30, 2012 1:14 PM (in response to Bob Jacobson)

    This is a public forum Bob, you can order people all you like, but you are without 'juice'

  • Bob Jacobson Level 1 Level 1 (115 points)
    Currently Being Moderated
    Jan 30, 2012 1:16 PM (in response to Csound1)

    Bye.

  • milwaukee_bronze Calculating status...
    Currently Being Moderated
    Jan 30, 2012 1:34 PM (in response to Csound1)

    Csound1 wrote:

     

    Repeatedly discharging Lithium Ion batteries until they are flat will in time destroy the cells, you do a great disservice to others by recommending this procedure, but such is life, I at least know to ignore you.

    Any evidence to back up your statement CSound?  I see bob documenting his reasoning, Any links to demonstrate your position on this?

     

    It's totally off topic and I know I'm adding fuel to the fire, wasting more pages on off topic content but it is an interesting thought.

     

     

    Thanks!

  • Csound1 Level 7 Level 7 (32,320 points)
    Currently Being Moderated
    Jan 30, 2012 1:37 PM (in response to milwaukee_bronze)

    "

    Usage guidelines

    [edit]Prolonging battery pack life

    • Avoid deep discharge and instead charge more often between uses, the smaller the depth of discharge, the longer the battery will last.[96]
    • Avoid storing the battery in full discharged state. As the battery will self-discharge overtime, its voltage will gradually lower, and when it is depleted below the low-voltage threshold (2.4 to 2.9 V/cell, depending on chemistry) it cannot be charged anymore because the protection circuit (a type of electronic fuse) disables it.[96]
    • Lithium-ion batteries should be kept cool; they may be stored in a refrigerator.[96][97]
    • The rate of degradation of Lithium-ion batteries is strongly temperature-dependent; they degrade much faster if stored or used at higher temperatures.[96][98]

    [edit]

  • Bob Jacobson Level 1 Level 1 (115 points)
    Currently Being Moderated
    Jan 30, 2012 1:49 PM (in response to Csound1)

    Wikipedia is such a reliable guide to batteries in general and Apple batteries in particular.  Like when you're copping a term paper. 

     

    Apple batteries have a special calibration technology built in for a purpose.  Unless you're saying Apple is misleading its customers, asking them to calibrate their batteries regularly, even if they keep their power sources plugged in.  Are you?  That would be doing Mac users a disservice, indeed.  And demeaning Apple.  This from the Apple webpage on lithium-ion batteries:

     

    Exercise Your Machine

    Lithium-ion polymer batteries need to be used for maximum performance. If you don’t use your device often, be sure to complete a charge cycle at least once a month. Click the links below to add regular reminders to your iCal calendar.

    Remind me to charge and discharge my iPod battery

    Remind me to charge and discharge my notebook battery

     

    Do what you like with your batteries, Csound1.  Let's move on.  Bye again.

    MacBook Pro, Mac OS X (10.6.8), Apple User Since 1981
  • Csound1 Level 7 Level 7 (32,320 points)
    Currently Being Moderated
    Jan 30, 2012 1:43 PM (in response to Bob Jacobson)

    Multicell devices

    Li-ion batteries require a battery management system to prevent operation outside each cell's safe operating area (over-charge, under-charge, safe temperature range) and to balance cells to eliminateSOC mismatches, significantly improving battery efficiency and increasing overall capacity.[99] As the number of cells and load currents increase, the potential for mismatch also increases.[100] There are two kinds of mismatch in the pack: state-of-charge (SOC) and capacity/energy ("C/E") mismatch. Though SOC is more common, each problem limits pack capacity (mA·h) to the capacity of the weakest cell.

    [edit]

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