不仅如此，此类电池将更加便宜，充电间隔时间更长。

Not only that, such batteries would be cheaper and would run for longer between charges.

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确定这个百分比的方法是：在一个规定的时间间隔内将电容器充电至某一额定电压，然后在第二个时间间隔内使电容器放电。

This percentage is determined by first charging the capacitor to the rated voltage for a specified time interval, then discharging it for a second time interval.

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