I use the the yoyo and the white adapter interchangeably between a 2001 iceBook and a 2003 12" PB G4. However, the 2001/yoyo combo sometimes needs a bit of jiggling to get contact and start charging. Personally, I prefer the white adapter for travelling since it doesn't need the extra length of power cord to plug it in. However, one of the fold-up "wings" has a broken plastic pin, so it takes a little bit of care to open and close it. Romain