This is a low energy-density device, which stores electricity directly by charging two conductive plates with static.

（和电池相比，）这是一种“低能量密度”设备，电能被直接存储在两块静止的导电板上。

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Enforcement is handled by nearly 700 video cameras within the charging zone, which capture images of number plates.

强制执行依靠的是围绕收费区的700台用于拍摄车牌号的摄像机。

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Similarly, in an ultracapacitor, when voltage is applied across the two metal plates (i.e. during charging), a charge still builds on the two electrodes—one positive, one negative.

同样，在超级电容中，当两块金属片被施以电压（即充电）后，电荷建立于两极，一极为正，一极为负。

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Inductive charging plates have been around for some time, and have been selling points on a number of handsets, notably the Palm Pre and its Touchstone charger.

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But the agreement of an open standard in 2008 by the Wireless Power Consortium (which has over 100 members, including Nokia, Samsung, Sony, HTC, Huawei, Motorola Mobility, and Belkin) offered the possibility of universal charging plates that could be used by any handset which followed the Qi standard.

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It also supports wireless charging, allowing users to recharge their phones using a Fatboy charging pillow, as well as stands and plates from other partners.

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