FlyerTalk Forums - View Single Post - Replace MacBook Air battery -v- Replace Computer
Old Nov 22, 2016 | 7:33 pm
  #15  
diburning
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It depends on how many charging cycles your battery has had. If your battery is rated for 1000 cycles for example, and it fails beyond 75% before the 1000 cycles are up, then it's under warranty. The batteries differ between different models and generations/model years.
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