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A new way to resuscitate a dead battery
Authored by: bluehz on Jul 21, '03 01:18:42PM

I have an iBook 2001 (late, dual usb) that has been giving me problems for the last 3-4 months. It would charge fine, but when it got to about 80% it would drop instantly to 0%. Gave me about 15 mins of time on it. I tried everything including the nvram techniques and nothing worked. I finally decided the battery had just lived its life and was depleted, even though I have rarely even used the battery.

After reading the Macintouch article last week - I decided to give it one more go. Tried the nvram rest, let it charge overnight - tried it... no go same behaviour.

So I read the article again and noticed one persons comments about using OS 9 was the trick on REALLY stubborn machines. Well I decided to give it the ol' "Try # 378" - rebooting into OS 9. I have long since 86'd OS 9 on my iBook so I had to pull out an old OS 9 boot cd. The process said to reset the nvram (as explained in this article) then reboot to OS 9 and cycle the battery. So I reset the nvram, then booted off OS 9 CD and pulled the plug. Nothing... after 15 mins it died. So I plugged it in and let it charge in OS 9 for several hours. Pulled the plug... voila... it ran for 1.5 hours (with no activity on it, but hey its an improvement. Now the big test - will it stick in OS X. So I rebooted into OS X and it appeared to be working. First I got about an hour out of it, then the next recharge it returned to its old habits of 15 mins, die at 80%.

So the solution listed partially worked for me. One thing I have not tried that one of the submissions at Macintouch mention - was disabling the Battery menu extra. According to the author - it is the menu that crashes and takes down the PMU (that controls power management and charging) with it. I have yet to try that technique yet though.

In summary - if all else fails including the nvram solution - try this:
* Reboot into OS 9 and cycle battery (discharge completely, then recharge)
* Remove the Battery menu extra



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A new way to resuscitate a dead battery
Authored by: nchen on Aug 31, '03 04:36:38AM

Last night my girl friend's iBook went hairwired. The battery simply would not charge and there was this single L.E.D at the battery that simply would not go away. Furthermore, any prominent characteristic was that the battery indicator in OS X says that it needed 7:30 hours to charge! To cut a long story short, I tried every hint here but to no avail. Then, just for kicks I booted into os 9, just to see what will happen. Instantly, the battery was detected! And it was fully charged. After rebooting in OS X, this effect seems pervasive. So, this might just be the very last resort.

IMHO, some idiot who used her iBook did something seriously to the OS 9 partition because when it started up, it went into repair start up disk.

One more thing, after this reboot into OS 9, the computer seems a bit more responsive and not as sluggish as it was.



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