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  1. #1
    iFX
    Guest
    Battery Life.. what a rip off.
    I just bought a 17" powerbook 2 weeks ago. The last time I calibrated my batter it showed 5 hours of battery life. Now as I type this to you I am at the airport and it only shows me 2.5 hours of battery life and I just turned on my computer.

    Why is this happening. I switched from "normal" to "better battery life" mode too.

    Please help!

  2. #2


    Member Since
    Mar 05, 2005
    Posts
    282
    5 hours of battery life on a PowerBook sounds overoptimistic. Perhaps that's the estimate under a particular workload that was unrealistic.

    BTW, I get about 2 hours on my r3000z laptop with an AMD chip and that's if I run it with Cool n Quiet and underclock it 50%.

  3. #3


    Member Since
    Jul 22, 2003
    Location
    Hamilton College
    Posts
    6,999
    Specs:
    20" iMac C2D 2.16ghz, 13" MacBook 2.0ghz, 60gb iPod vid, 1gb nano
    Wireless internet, sound on and full brightness on the screens greatly reduce the battery life. The battery lifes they list are with it just sitting there. I get like 3.5-4 hours on my powerbook with normal use and no airport on
    Don't forget to use the new User Reputation System

  4. #4

    the_New_guy's Avatar
    Member Since
    May 08, 2004
    Location
    delhi.india
    Posts
    344
    Specs:
    MacBook 2.4Ghz Black 4GB;iPod Touch 8GB;iPod mini 4GB silver;Logitech MX1000;
    my dad get 2.5-2.75 hrs max
    on 15"pb
    Mac OSX is the bomb :bomb:
    The Gadget Cast Gadgets.in

  5. #5

    PowerBookG4's Avatar
    Member Since
    Jan 08, 2005
    Location
    New Jersey
    Posts
    6,188
    Specs:
    Mac Pro 8x3.0ghz 12gb ram 8800GT , MBP 2.16 2GB Ram 17 inch.
    on my 15inch i get 3 hours max, with screen brightness turned down, no volume, and no airport/ bluetooth

    plus the 17inch is even worse on battery becaue of the screen size, that is why I got the 15inch.

  6. #6
    Kokopelli
    Guest
    Am I a freak or do the 12" PBs have better battery life then? My 12" 1.33 gets 5+ hours with wifi active provided I crank the monitor brightness to one above minimum. And this is on a 6 month old battery with a cycle count of 74.

  7. #7

    coach_z's Avatar
    Member Since
    Jul 23, 2004
    Location
    North NJ
    Posts
    3,169
    Specs:
    i dont have no mac's
    Quote Originally Posted by Kokopelli
    battery with a cycle count of 74.
    doyou count this or is there some program for this???

    basically the more things you do the shorter your battery life is going to be....i can type a document and get about 4.5 hours on my 2 year old pb, but that is only typing and nothing else...

    last night i only got 1.5 hours when i was surfing with multiple windows on adiumx checking email listenting to music ...i did need to drain my battery and recharge it though it has been a while
    -chris
    MoTM honor roll...
    when?
    i dont remember

  8. #8
    Kokopelli
    Guest
    Quote Originally Posted by coach_z
    doyou count this or is there some program for this???
    Open system profiler and battery cycle count is under power.

  9. #9

    TOYOTA's Avatar
    Member Since
    May 20, 2005
    Location
    New York / Oklahoma
    Posts
    205
    Quote Originally Posted by iFX
    I just bought a 17" powerbook 2 weeks ago. The last time I calibrated my batter it showed 5 hours of battery life. Now as I type this to you I am at the airport and it only shows me 2.5 hours of battery life and I just turned on my computer.
    That is normal. The 5 hour battery life is ridiculous - I do not think you will ever attain that number if you actually use your computer. The maximum battery life hours you read from Apple are usually going to be higher than you get time after time. Those are MAXIMUM numbers. When using your notebook, especially nearly always having Airport on as I do, it will be in the 2-3 hour range. And like others mentioned, screen brightness, bluetooth, etc all effect this. So don't be dissapointed, this is how they are. Good luck!
    Richard
    iPhone
    Powerbook 15
    Powerbook 17

  10. #10
    Kokopelli
    Guest
    Quote Originally Posted by TOYOTA
    That is normal. The 5 hour battery life is ridiculous - I do not think you will ever attain that number if you actually use your computer.
    My battery lasts that long regularly. I unplugged my laptop when I made the first post on this thread. since then I have been browsing the web wirelessly, working on a document in Pages, and running iTunes. 2 hours later my battery meter shows 3:19 left.

    What qualifies as actually using your computer?

  11. #11
    jessica
    Guest
    Yeah 5 hours on a 17" is freakishly overstated.

    On a side note. I have a Cycle Count of 25, but my PowerBook has been plugged into the wall for about 1.5 weeks straight and I've noticed that first it'd say 100% then 99% today it says 97% and it's been plugged in. So I unplugged it and I intend to let it drain in hopes that fixes the discrepency.

  12. #12

    TOYOTA's Avatar
    Member Since
    May 20, 2005
    Location
    New York / Oklahoma
    Posts
    205
    Quote Originally Posted by Kokopelli
    My battery lasts that long regularly. I unplugged my laptop when I made the first post on this thread. since then I have been browsing the web wirelessly, working on a document in Pages, and running iTunes. 2 hours later my battery meter shows 3:19 left.

    What qualifies as actually using your computer?
    I wasn't referring to the 12", I've never used one. The original question by iFX was about his 17".
    Richard
    iPhone
    Powerbook 15
    Powerbook 17

  13. #13
    Mrclean
    Guest
    How do you change the settings of the monitor and % of cpu use?

  14. #14

    sarahsboy18's Avatar
    Member Since
    Jan 30, 2005
    Location
    Fort Worth, Texas
    Posts
    1,069
    Specs:
    Mac Pro, 8-Core 2.8Ghz, 10GB RAM, 2x1TB HDDs, iPod U2 Edition
    My 17" PB gets around 2.5 hours depending on the workload... my 12" iBook gets 5-6 hours.... That 5 inches of screen makes a HUGE difference.

    But I'd like to see any 17" PC laptop even come close to 2.5 hours... my 15" toshiba only gives me around an hour and I just put a brand new battery in it.
    "If you had a friend who was a tightrope walker, and you were walking down a sidewalk, and he fell, that would be completely unacceptable." -Mitch Hedberg

  15. #15
    SErgini0
    Guest
    My 15" battery lasts 3.5-4 hours depending on use. I usually have Airport on, but turn down the screen brightness and backlight keyboard. Also make sure you don't have any devices draining the power, i.e USB devices, CD/DVD...

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