That's a sit-com situation if I ever heard one. Although I believe, those two AC adapters MAY be interchangeable. At least certainly, the one from the Al-Book will power the iBook 600 without any difficulties. You can't tell from the AC cable or the AC direct plug (plugs the brick directly into your power socket) because Apple so brilliantly made the AC Adapter brick plug-swapable. If I recall with my iBook (G3) 600 that its powerplug (that goes into the unit) was silvery and not iBook white. Another guess would be an inspection of the bricks themselves -- the iBook's might look older. Maybe. (More scratches, dirt, scuffs). Only last thing to do is to put on your reading glasses and inspect the power specs on the sides of the bricks -- the Al-Book's should have something bigger/later about it, whether it's power output or model/serial number or best yet, a later copyright year. -J ______ On Sat, 11 Dec 2004 2:33 pm, Brian Olesky wrote: > I just noticed that my wife's AC extension power cord for her 600 iBook > and > mine, for my 1.5 Gig AlBook are sitting on the table right next to each > other and we don't know which is which.