Can I use the power adaptor from the 15" G4 Powerbook 400 MHz with the 12" iBook 1.33 GHz. I've had the former for 4 years and I just got the latter today. I want to leave one power adaptor at home and one at work, both for use with the iBook which I will take back and forth between home and work, but I'm afraid the older power adaptor will fry the battery or something. Any ideas?