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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Notebooks > incorrect battery callibration

incorrect battery callibration
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Dec 12, 2005, 02:19 AM
 
let me preface this by saying two things:
A: this is the first apple i`ve owned, but i`m a computer dork with 12 plus years of computer ramblings...
B: i have searched for probably 8-9 hours hard time infront of a monitor to come up with no good solutions

i`ll throw in a 3rd: i am in, and bought my powerbook in japan, which has less to do with anything other than I`d prefer to fix this problem myself then go back and have a return/exchange conversation with someone who speaks no english



Being that this is my first apple, when i got home, i was quite excited, and just popped open the box, and pushed the powerbutton.... I completely forgot that it was a laptop for a minute, and did not remember to connect the AC adapter till osx had come completely up... and now, after trying many methods of resetting the pmu, and whatnot(i haven`t figured out the resetting nvram/reset all) firmware prompt yet, but I`m working on it) my battery things it`s always fully charged, and considering i have never unplugged the thing really, it should be... but when i press the button on the battery, no lights show up, and i am constantly told by the menu that it will be 150plus hours till the batter is fully charged(the green ring is on the power adapter, which means it`s fully charged, if i remember right...) well... i then attempt the calibration technique on apple`s site... unplug the power and wear out the battery... ok..... the second i unplug the power, the laptop shuts down... as in powerfailure style shutdown... I can however make the computer sleep, and unplug without too many issues, but then another problem comes up. After it`s asleep like a little baby, it takes on my own idiosyncrasies and will not wake up no matter what I do... Seeing as I bought it 4 days ago, I am stressed, because I love everything else about this computer, other than the battery issue, which i believe to be my own fault, and not apple`s...


it`s the new 15" widescreen with the upped resolution, and DL DVD drive

any and all help will be greatly appreciated, thank you in advance
and if i can provide further details, please ask and I`ll give any information you might find useful!

-mooky
     
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Dec 12, 2005, 03:42 AM
 
First, just try taking out the battery to reset it and put it back in. Then leave the machine charging overnight. The light on the AC adaptor plug should be orange. Just let it charge. If this doesn't work, reset the PMU as described in this article:

http://docs.info.apple.com/article.html?artnum=14449

Steve
     
mooky  (op)
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Dec 12, 2005, 06:03 AM
 
took battery out, left it for a good 5-10 minutes.... stuck it back in... no change, still says over 150 hours till fully charged, and light remains green...

i`ll just leave it on all night and see what happens tommorow but as for the PMU reset.... tried it... took battery out for a good 5-10 minutes again and held the button as it says to do.... all it did was reset my time and make it take longer to boot up the first time....

still no lights showing up on battery LED`s

;-;
-mooky
     
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Dec 12, 2005, 06:56 AM
 
You might also try unplugging the AC adapter from the wall socket for several minutes and reconnecting.

I've had similar situations on several powerbooks ranging from--all 4 led's but dead battery, no led's but still had charge, stuck at 0%-98%-99%-etc won't charge, sleep deep descharging battery, no shutdown warning.....

Open firmware resets or pmu resets didn't work....usually I just kept working and ignoring it over time most problems magically fixed themselves. I know it sounds wierd, but it's true.

Also, sometimes removing battery, wait a minute, reinsert....repeat ten times might do it ( this is from the Apple site) .

edit:
don't forget that even on a properly functioning PB, it sometimes take 15 to 30 seconds after plugging in the AC for the lightning bolt to appear...so be patient.
(Last edited by shunt; Dec 12, 2005 at 07:03 AM. )
Please keep in mind the ambiguously selective general understandings we've all agreed upon...
     
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Dec 12, 2005, 07:02 AM
 
If the computer shuts off immediately when the AC power is removed, the battery is defective and needs to be replaced. No reason to fool with this on a brand new computer.
     
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Dec 12, 2005, 07:38 AM
 
i have had something similar happen to a battery of mine in my 12" pb rev A. after 2 3/4 years the battery suddenly began indicating that it was going to take 24 hours to charge but hten only taking 45 minutes. I reset everything and reinstalled tiger to no availe. The chaps at my local apple store were perplexed too.
Only replacing the battery fixed the problem. I would seriously consider sending the machine back, even if the battery hasn't been calibrated out of the box that shouldn't happen.
     
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Dec 12, 2005, 08:37 AM
 
Originally Posted by mooky
... bought my powerbook in japan, which has less to do with anything other than I`d prefer to fix this problem myself then go back and have a return/exchange conversation with someone who speaks no english
-mooky
reading is fundamental....
Please keep in mind the ambiguously selective general understandings we've all agreed upon...
     
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Dec 12, 2005, 08:51 AM
 
Originally Posted by shunt
reading is fundamental....
yup, i saw that.
But is it actually possible to flash the chip on the battery?
     
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Dec 12, 2005, 09:05 AM
 
another double post...
(Last edited by papworth; Dec 12, 2005 at 10:17 AM. )
     
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Dec 12, 2005, 09:28 AM
 
Originally Posted by papworth
yup, i saw that.
But is it actually possible to flash the chip on the battery?
It may be, but the key would be that you'd need to have both the equipment to do so, as well as know with what code the battery needs to be flashed.
     
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Dec 12, 2005, 10:16 AM
 
...double post
     
mooky  (op)
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Dec 13, 2005, 10:55 PM
 
I grew the balls, and the electronic dictionary to just take this powerbook back to the store where i bought it... after about an hour of explination, and trying various things with the tech guys there, they could not conclude if it was the powerbook or the battery at fault, we stuck another battery in, that was not fully charged, and it read the charge on the battery properly, but even after 10 minutes of being plugged in, refused to charge the new battery. Because of this, they have agreed to simply exchange the powerbook for a brand new one, the only down side, is moving the few things i`ve aquired, and that it will take about 4-5 days to get another laptop into the store.... stock is strange in japan, i haven`t figured it out yet to be honest, but i appreciate all the help and responses from everyone


-mooky
     
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Dec 13, 2005, 11:24 PM
 
And just as an aside, Apple's computers are not "Apples". They're Macs, or Macintoshes. Choose your naming convention.



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