IBook G4 Battery Capacity Way Down

I've had this computer for 12 months now, and noticed that the battery doesn't last more than an hour anymore. I grabbed CoconutBattery, and found that its Maximum Battery Charge is 1127 mAh, about 25% of the battery's original capacity. It has also had 215 cycles.
I've tried resetting the nvram, and the PMU (hit shift-ctrl-option-power, but nothing happened so I am not sure if the PMU was actually reset) and I'm still stuck where I am.
Is there any hope for this battery, or is it time to replace it?

My 14" 1.2ghz iBook was purchased in June 2004. We went to Colorado in August 2004 and my daughter was able to play one of the Lord of the Rings DVDs and most of the trailers before the iBook shut down.
This weekend coming back from Thanksgiving she was watching Lord of the Rings again and only got 2 hours and 42 minutes before the iBook shut down. She never got a warning displayed while the DVD was running but I have seen it when just in the Finder. Shouldn't an OS warning override any application even a DVD in full screen?
When I got home I downloaded Capacity Meter and it only shows 3302mah out of 4600mah! Only 51 cycles are shown also. I ran this Terminal command to verify it also:
ioreg -l | grep -i IOBatteryInfo
I found this link on the Apple support site
http://www.apple.com/batteries/notebooks.html
There was this paragraph on the page:
Battery Lifespan
A properly maintained PowerBook or iBook battery is designed to retain up to 80% of its original capacity after 300 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs.
My iBook is kept on power most of the time but occasionally I'll use it on the couch for an hour or so then plug it in. I've done a few discharges to where I get the warning dialog then I'll recharge it.
I was expecting the capacity to be down somewhat but it's only 72%. I have Applecare. Is this battery warrantable since I have only 51 cycles vs the 300 listed above? I see Newer Tech has higher capacity batteries. Are these batteries better, i.e. new chemistry?
Thank for any advice.
Kelvin

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