Five nanogenerators working together produced about 1 micro ampere output current at 3 volts about the same voltage generated by two regular AA batteries.

5个纳米发电机同时工作可以产生1微安培3伏特的输出电流，与2节普通的5号电池所产生的电压差不多。

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The relationship between the control voltage and the current output by the constant-current source may shift.

控制电压和由恒流电源输出的电流之间的关系改变可能会产生漂移。

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It has excellent output stability by following up the variation of input voltage and connected load, they almost can't be damaged in normal use.

它遵循了输入电压和负载变化连接良好的输出稳定，他们在正常使用下几乎不会有损坏。

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One problem is that typical power meters work by measuring the voltage output and converting that to charge remaining.

WSJ: Some Percentages Are Just Fair-Weather Friends