Ibooks battery power from 22 % to 0%

hi all ,
I was looking for this issue if any one has faced it but can't find any. I had an year old Ibook g4 and it was working fine untill some day it was low in battery.
I saw it at a 33 % level at first and within seconds it responded that battery using system safe power or something like that( i dont remember that exactly).
And same happened it today when the power was at 22 % it dropped to zero level in no time .. I have no idea why this happened. My warranty just got over so i am clue less to find any help from them...
Any help would be great.
Anshul
IbookG4 Mac OS X (10.4.7)

If you checked to see whether or not your computer's battery was among
those specified serial numbered ones in that Apple listed in their Recall
page, and it was not; perhaps you need to see in System Profiler >
Power in the computer, what the battery cycle count and amp hour life
and other battery-related readouts are in there.
When your computer went to sleep after the menubar battery gauge went
to Zero, did you immediately plug in the power adapter and give the battery
a 6 hour or maybe 8 hour charge; at least until the amber/orange indicator
light on the charging wire had turned green, then wait maybe another half
hour before disconnecting the charger and starting the computer? Could
be you need to run the battery to zero again and then let it go to sleep;
and yet again reattach the power adapter and just let it charge; maybe
even 12 hours to overnight that time, to be sure it really is charged as
full as it will reasonably get. Then look into the System Profiler> Power
section to see what the battery says for original battery Amp/Hr (that'd
be the new capacity) compared to the second amp hour listing shown,
which would be for the battery as it then appears to the System.
A low battery amp hour listing indicate (after all that) the battery may be
going bad. But it may be only the calibration of the battery was needed
and the charge memory and indicator were needing a reset & recharge.
But if your computer's battery is among those recalled, you should stop
using the battery as soon as possible and follow the instructions in the
battery recall information and order page. They say to remove a recalled
battery and run the computer from the AC power adapter until a new
battery arrives. There are additional instructions with replacement batteries.
Identify batteries recalled here: Battery Exchange Program for iBookG4 and PowerBookG4

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Ibooks battery power from 22 % to 0%

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