Normal Battery Discharge?

I have and continue to have battery discharge issues with my Powerbook G4. I get conflicting answers from the Genius Bar as to whether what I am experiencing is normal or not normal.
After a 24 hour period of my laptop being shutdown and unplugged from AC power, my battery has a 15min/7% loss. In other words, when I replug in my computer to AC power and turn it on, my computer says that my previously fully charged battery is only 93% charged and needs 15 minutes of charge time. (plus, it takes longer than that 15 minutes to actually reach the 100% charged listing).
I just replaced my battery and the PMU has been reset.
Anyone have any ideas? This is an intermittent problem as sometimes the battery remains charged at 100% after sitting for 24 hours and other times it does not.
Thanks!

Loosing 7% charge in 24 hours is not normal if the PowerBook was shut down (but would be fine if it was sleeping).
Are you sure that the battery was at 100% charge when you turned off and disconnected the PowerBook? When using the PowerBook plugged in, the power manager allows for the charge to drop to 95% before charging again.
The top few percents of charge may be special and hard to measure accurately. I suggest that you repeat your test, but start from a medium charge like 60%. Does it loose 7% in this case, too?

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