MacCharger #4 AC Adapter for PowerBook & iBook Durable. Tapered whip cord prevents fraying, sturdy design. Quality workmanship. The brick of the AC Adapter is enclosed in a sturdy, polymer shell. Compact and portable. About the size of a pack of playing cards and about as wide as a credit card. Reliable. Produced by MacWizards, with over a decade experience supporting Macintosh notebook computers. 100% Macintosh compatible. Designed from the ground up specifically for PowerBook and iBook.