苹果公司表示，这么做是有道理的，因为使用内置电池的话，公司就可以将电池做的更大，又不用加大笔记本电脑的厚度。
Apple says this makes sense because sealing in the batteries lets the company make them larger, without adding heft to the laptops.
iPad的电池寿命给我留下了很深的印象。我发现它比苹果公司所说的10个小时还长，也远远长于我的笔记本电脑和智能手机。
I was impressed with the iPad's battery life, which I found to be even longer than Apple's ten-hour claim, and far longer than on my laptops or smart phones.
实际上，除了去年推出的一款低端的MacBook笔记本电脑，苹果公司的整个笔记本电脑产品系列目前都使用了内置电池。
In fact, Apple's entire line of laptops now USES sealed batteries, except for one low-end MacBook model from last year's series.
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