由两片接近并相互绝缘的导体制成的电极组成的储存电荷和电能的器件。
电容器不依靠电-化学转化。 相比电池，电容器能够更快的充电和放电，持续使用时间更长，并且更轻。
Without the chemical-electrical conversion, a capacitor can be charged and discharged much more rapidly than a battery, last longer and weigh less.
但是，比起传统电容，超电容器能够储存更多的能量，并且可以为小的设备如模型飞机和玩具直升飞机等玩具提供电能。
Super capacitors, however, store much more energy than their traditional counterparts and are used to power small devices such as toys including model planes and helicopters.
像电池一样，电容器能够储存能量，但是这也是电容器和电池相似的唯一地方。
Capacitors, like batteries, store energy, but that's where most of the similarities end.
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