苹果帮你解释为什么要用不可拆卸电池。来自 Macworld 2009 Keynote 上对 17-inch MacBook Pro 的介绍视频。
原文(刚才大概听了一下原视频):

The key to building a long-lasting battery is making it bigger. The bigger battery, with more capacity, means longer battery life. When we design a portable product, every tenth of a millimeter is precious. The challenge, designing a bigger battery, is ways to find the space to put it. We find when you design for a movable battery, there is a lot of waste of space. A lot of that space and volume is used for mechanisms, structure, battery compartment, even removable doors. By embedding the battery, we are removing all the structures associated with the removable battery; we are able to create a notebook with the 40% larger battery, that last up to 8 hours on a single charge, at the same size and weight.

翻译:
将电池做大是延长续航的关键。更大的容量更足的电池将带来更长的使用时间。当我们设计一款移动产品时,每一点厚度都很宝贵。将电池做大这个挑战的内涵是找地方放更大的电池。我们发现如果我们用可拆卸电池,很大的空间被浪费了。很多空间和体积被用在了机械装置、结构、电池厢,甚至拆电池用的扳手上。我们将这些和可拆卸电池有关的部件通过内嵌电池去掉,这样我们就在不牺牲尺寸和重量的情况下制造了一台有 40% 更大容量电池,和 8 小时续航的笔记本电脑。

引用李楠(http://www.zhihu.com/question/22236910/answer/20820664):

  • 更大:可拆卸电池的外壳,卡槽等设计会占用空间,从而减少真正电池的容量(和 MX2 一样的机身用可拆卸电池,电池容量会减少 15% 左右)。

— 完 —

本文作者:Elvis Hu

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此问题还有 21 个回答,查看全部。
延伸阅读:
为什么 MX2 电池不可拆卸却用可拆卸后盖?
为什么智能手机没有耐用的电池?

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