这个名为Touchstone的充电器，仍然需要插在电源插座上，但它能让Pre的拥有者们可以方便地将他们的手机放在充电座上充满电。

The charger, dubbed Touchstone, still has to be plugged in to a mains socket, but it means Pre owners can simply lay their phone on the charging pad to top up the battery.

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这是我附在机翼的底部，并开始摆动机翼使用我的电池充电器的电源。

This I attached to the bottom wing and began to oscillate the wing using my battery charger as a power source.

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了解电源和充电器的测试过程，会使用相关测试设备。

Knowing the power supply and charger test process and be familiar with test instrument.

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