Is the battery life on your iBook or PowerBook G4 somewhat anemic? Apple may have a fix. Users of white iBook G3s, iBook G4s, and Aluminum PowerBook G4s (all 12" and 17", 15" "FW 800" models only) running OS X 10.2 or later can grab the Battery Update from Software Update. From Apple:
About the Battery Update
The Battery Update enhances the performance of the battery to ensure that full capacity is available for your PowerBook or iBook.
Installation of the Battery Update requires Mac OS X 10.2 or later.
The Battery Update supports the following products:
- iBook (Dual USB)
- iBook (Late 2001)
- iBook (Opaque 16 VRAM)
- iBook (32 VRAM)
- iBook G4 (12-inch)
- PowerBook G4 (12-inch)
- PowerBook G4 (12-inch DVI)
- PowerBook G4 (15-inch FW 800)
- PowerBook G4 (17-inch)
- PowerBook G4 (17-inch 1.33GHz)
Note: Once the Battery Update software has been installed, each battery you install in your PowerBook or iBook will be updated automatically.
You can grab the update from your Software Update pane. The update is not yet available on Appleis site as of this writing.