There's not any serviceable parts for non-professional personnel inside the device. Non-professional personnel are forbidden to open the device which may result in electrical shock.

本机内部无任何非专业人员可维修之部件，非专业人员请勿擅自打开机器，以免触电。

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The success of the non-upgradeable Air empowered Apple to release the even-less-serviceable iPad two years later: The battery was glued into the case.

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