원문 게시자: originalmachead ,
''You are at the '''volunteer DIY discussion board - '''not iFixit customer service.'' Used batteries are . . . used. New batteries are new. Some new batteries are occasionally bad right out of the box (especially Chinese knock-offs). A cheap battery will not perform as well as an Apple OEM. Some of the newer batteries last longer than the 2009 ones. If you wish to speak with someone at iFixit -[http://www.ifixit.com/Info/contact|contact] them. ''If this answer was helpful'' '''please remember to mark it accepted'''.''