The built-in rechargeable battery has a life of five hours.

内置的充电池可使用长达五小时。

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It has built-in rechargeable battery and looks cool, light weight, small and compact - it weighs only 90g.

它带有内置式可充电电池，看上去很酷，重量又轻，小巧紧凑——只有90克重。

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It featured a touch-sensitive screen, with a built-in battery. Once tilted on its built-in stand, it could be used as a desktop computer with the attachable Folio keyboard.

Macintosh Folio带有触摸屏及内置电池，当使用它的附属支架立置时，可以连上Folio外接键盘当作台式电脑使用。

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And really, there wouldn't have been much of a downside if Acer went with that form factor instead: you'd get the cradle and keyboard in one piece, along with a built-in battery and a smattering of ports.

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With a built-in battery that lasts for approximately eight hours you can enjoy your music anywhere.

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There's also the problem of the iPhone's built-in battery, which can't be swapped without a trip to the factory.

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