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How long should the battery last?

2108 Views 5 Replies Latest reply: Jun 18, 2008 3:09 PM by macindonna RSS
boquita Calculating status...
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Jun 16, 2008 6:13 PM
Hello:

I have a MacBook Pro from february 2007. The battery (which Apple had to replace while under warranty), lasts for about 2:30 to 3 hours, depending on what I am doing. Is that normal? What is the expected/theoretical time it should last before completely dischanging?

Thanks
macbookpro, Mac OS X (10.4.10)
  • neuroanatomist Level 7 Level 7 (31,685 points)
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    Jun 17, 2008 6:08 AM (in response to boquita)
    That's pretty normal, yes, and nothing to be concerned about.

    You can check the "health" of your battery in System Profiler - look at the numbers for Full Charge Capacity and Cycle Count. Health is the percent of the original (new battery) capacity, which is 5500 mAh for a 15" MBP, and 6300 mAh for a 17" MBP, i.e. (current Full charge capacity / 5500 or 6300 * 100). Apple spec is 80% health for 300 cycles. Li-based batteries like the one in your MBP have a useful life of 400-500 charge cycles or 3-4 years, whichever comes first.

    Hope this helps...
    17" CD MBP, iPodTouch, Mac OS X (10.4.11),  since the ][e
  • Network 23 Level 6 Level 6 (11,500 points)
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    Jun 17, 2008 9:52 AM (in response to boquita)
    Are you already turning off Bluetooth and turning down the backlight a little? If not, do those things to make the battery last longer, they definitely impact run time. Having AirPort wireless on also consumes power, but most of us need to keep that on for networking.
    Mac Pro, MacBook Pro, Mac OS X (10.5.3), PowerBook G4 15" Al, PowerBook G3 FireWire, PowerCenter Pro, PowerBook 160
  • Ian-K Level 1 Level 1 (100 points)
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    Jun 18, 2008 12:56 PM (in response to Network 23)
    the models with the led screen last alot longer, obviously becasue there more economical on power

    i have a 2008 model and im getting at least 3-4 hours when using for internet browsing via wireless, bluetooth off
    Macbook Pro 2.5 Ghz, Mac OS X (10.5.3), Ipod Touch 16GB
  • Network 23 Level 6 Level 6 (11,500 points)
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    Jun 18, 2008 2:27 PM (in response to Ian-K)
    Ian-K wrote:
    the models with the led screen last alot longer, obviously becasue there more economical on power
    i have a 2008 model and im getting at least 3-4 hours when using for internet browsing via wireless, bluetooth off


    That is very true, I have a 2008 MacBook Pro and am also getting 3-4 hours. But since the original poster has an older MacBook Pro, I didn't bring up the LED screen or my own battery runtime since it doesn't apply here.
    Mac Pro, MacBook Pro, Mac OS X (10.5.3), PowerBook G4 15" Al, PowerBook G3 FireWire, PowerCenter Pro, PowerBook 160
  • macindonna Calculating status...
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    Jun 18, 2008 3:09 PM (in response to boquita)
    All of a sudden my battery won't hold a charge past 12 minutes? Do I need a new battery? This is the replacement battery I was sent after the recall..help...
    mac book pro

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