I've had my iBook for about one year now, so the new bat­tery was a wel­come re­new­al which ba­si­cal­ly means the life-span of my iBook is ex­tend­ed by a year, like 25% - 33%. While Ap­ple can prob­a­bly have the trou­bled bat­ter­ies re­placed for free from Sony, Ap­ple will still suf­fer from cus­tomers who now have their mo­ment of "Do I buy a new bat­tery or do I buy a MacBook?" moved back about a year. A cou­ple of months ago I also had the main­board re­placed due to a bro­ken in­te­grat­ed air­port, so it's like the vi­tal parts of my iBook haven't aged af­ter one year.