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Switcher Hangout The place for switchers to discuss their new machines, and how to work with OS X. General support can be had here for newbie stuff, like "How do I restart my new iMac?" :)

Battery Life.. what a rip off.


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iFX
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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!
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mmoy

 
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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%.
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trpnmonkey41

 
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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

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the_New_guy

 
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my dad get 2.5-2.75 hrs max
on 15"pb

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PowerBookG4

 
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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.
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Kokopelli
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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.
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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

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Kokopelli
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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.
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TOYOTA

 
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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
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Powerbook 15
Powerbook 17
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Kokopelli
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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?
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jessica
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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.
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TOYOTA

 
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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
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Powerbook 15
Powerbook 17
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Mrclean
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How do you change the settings of the monitor and % of cpu use?
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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
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SErgini0
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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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