Apple has released an International-English Mac OS update for iBooks – the iBook (FireWire) Battery Update.
This 519 or 705K download corrects a problem found recharging the battery in some FireWire-equipped iBooks. Without the update, the battery may fail to recharge after a long period of inactivity.
Mac OS X users must restart their iBook in Mac OS 9.0.4 in order to install the update, using the Startup Disk panel found in System Preferences.
The update is freely available for download at Apple's Software Downloads Web site.