Goodbye Exchanged PB battery

This afternoon, I sent my PowerBook battery to Apple Store to exchange a battery. However, I could not get a new battery immediately, the salesman said that I had to leave the battery there for about 4 to 6 weeks until the new battery arrives. Therefore, from now on, I do not have any battery in my PowerBook, and I have to wait about one and half month to get a new battery.... Sigh... Hope that I can have it back as soon as possible; otherwise, I cannot bring my PowerBook anywhere without a charging adaptor.