I have a 550 MHz Powerbook Ti. My cat, bless her, chewed through my power cord (she's OK). I didn't even realize it until I got a reserve power warning and found the cord was dead. I went to the Apple Store, and all they had was this 65-watt adapter (the old Powerbooks use 45 watts). I asked the guy behind the counter if it would be OK for mine (I had my doubts). He said yes, but he wasn't even looking at me as he said it. He was completely checked out. I plugged it in, and my computer didn't explode, and it charged back up, but I was still concerned. I asked a tech guy I know, who asked another, and the answer was that a 65-watt adapater will power the old ones, but I really shouldn't do that; I should get the right one. Twice now I've had a flurry of warnings on the screen--about six appearing simultaneously--that speak of a USB device using too much power (sorry, I don't remember the actual text of it off the top of my head). On Apple's site, I find this: Right. Well, I'm sure as heck not using the one that came with my computer, am I? What with the hole in the wiring and all...started sparking. Yep. Anyway, I'm really, really mad at the jerk at the Apple Store who was of no help to me at all. I guess if I'm not asking about an iPod, he can't be bothered. Because I swear half the store is iPods and iPod gear now. ("What? A computer? Do we sell those?") I may see about getting this uber-powerful adapter returned or hawk it on eBay or something. In the meantime, I'm not sure what to do. I've searched sites like eBay for these things, and the best there is is a 45-watt adapter that has that extra cord, the one with a 3-prong plug. Why can't I find one of the originals out there without that extra? Are they not allowed to sell them aftermarket or something? Will the ones with the extra cords work? Will Apple take back the one I have without the box it came in? Man, it sucks to be 4 years behind the curve.