重點文章
小編用了 MacBook Air 已經兩年，雖然未至於嚴重損壞，但電量似乎比兩年前不再耐用，電池用了兩年，質素始終會下降，如何可以知道自己 MacBook 的電池是否到了極限？
按實 Option 鍵再打開螢幕左上角的 選單，按「系統資訊……」。打開 MacBook Air 的視窗後按左邊的「電源」，你會看到「健康狀態資訊」中的「循環使用次數」，就可以看到你的 MacBook 電池「被完全充電」的次數。
看這些次數有什麼作用？MacBook 電池作為鋰充電池，充電次數有上限，超過上限之後，電池的實際容量會越來越少，這時候就會換電池了。蘋果的支援網站其實列出了過去眾多型號的 MacBook 電池， MacBook Pro（Early 2009）、MacBook Air (Late 2010) 、Retina MacBook 或以後的 MacBook 型號，充電循環上限固定為 1000 次，而較舊款的型號則為 500 次和 300 次。想知道，可參見下面的列表。
電池循環使用次數上限是 1000 次
- MacBook (Retina, 12-inch, Early 2016)
- MacBook (Retina, 12-inch, Early 2015)
- MacBook (13-inch, Mid 2010)
- MacBook (13-inch, Late 2009)
- MacBook Pro (Retina, 13-inch, Early 2015)
- MacBook Pro (Retina, 13-inch, Mid 2014)
- MacBook Pro (Retina, 13-inch, Late 2013)
- MacBook Pro (Retina, 13-inch, Early 2013)
- MacBook Pro (Retina, 13-inch, Late 2012)
- MacBook Pro (13-inch, Mid 2012)
- MacBook Pro (13-inch, Late 2011)
- MacBook Pro (13-inch, Early 2011)
- MacBook Pro (13-inch, Mid 2010)
- MacBook Pro (13-inch, Mid 2009)
- MacBook Pro (Retina, 15-inch, Mid 2015)
- MacBook Pro (Retina, 15-inch, Mid 2014)
- MacBook Pro (Retina, 15-inch, Late 2013)
- MacBook Pro (Retina, 15-inch, Early 2013)
- MacBook Pro (Retina, Mid 2012)
- MacBook Pro (15-inch, Mid 2012)
- MacBook Pro (15-inch, Late 2011)
- MacBook Pro (15-inch, Early 2011)
- MacBook Pro (15-inch, Mid 2010)
- MacBook Pro (15-inch, 2.53 GHz, Mid 2009)
- MacBook Pro (15-inch Mid 2009)
- MacBook Pro (17-inch, Late 2011)
- MacBook Pro (17-inch, Early 2011)
- MacBook Pro (17-inch, Mid 2010)
- MacBook Pro (17-inch, Mid 2009)
- MacBook Pro (17-inch, Early 2009)
- MacBook Air (11-inch, Early 2015)
- MacBook Air (11-inch, Early 2014)
- MacBook Air (11-inch, Mid 2013)
- MacBook Air (11-inch, Mid 2012)
- MacBook Air (11-inch, Mid 2011)
- MacBook Air (11-inch, Late 2010)
- MacBook Air (13-inch, Early 2015)
- MacBook Air (13-inch, Early 2014)
- MacBook Air (13-inch, Mid 2013)
- MacBook Air (13-inch, Mid 2012)
- MacBook Air (13-inch, Mid 2011)
- MacBook Air (13-inch, Late 2010)
電池循環使用次數上限是 500 次
- MacBook Air (Mid 2009)
- MacBook (13-inch Aluminum, Late 2008)
- MacBook Pro (15-inch Late 2008)
電池循環使用次數上限是 300 次
- MacBook (Mid 2009)
- MacBook (Early 2009)
- MacBook (Late 2008)
- MacBook (Early 2008)
- MacBook (Late 2007)
- MacBook (Mid 2007)
- MacBook (Late 2006)
- MacBook (13-inch)
- MacBook Pro (15-inch, Early 2008)
- MacBook Pro (15-inch, 2.4/2.2GHz)
- MacBook Pro (15-inch, Core 2 Duo)
- MacBook Pro (15-inch Glossy)
- MacBook Pro (15-inch)
- MacBook Pro (17-inch, Late 2008)
- MacBook Pro (17-inch, Early 2008)
- MacBook Pro (17-inch, 2.4GHz)
- MacBook Pro (17-inch Core 2 Duo)
- MacBook Pro (17-inch)
- MacBook Air (Late 2008)
- MacBook Air
