A decent modern supercapacitor has a power density of several kilowatts per kilogram.

一个优秀的现代超级电容器的功率密度是每公斤几千瓦。

This freedom of movement, the company reckons, will boost the arrangement's power density by a factor of ten.

该公司估计，这种自由移动将使这种装置的功率密度提高10倍。

This battery pack has a longer lifespan and a higher power density – which makes them ideal for powering a vehicle.

这种电池组具有更长的使用寿命和更高的功率密度，这使它们成为驱动汽车的理想选择。

This is easily and rapidly discharged, so capacitors have good power density (the rate at which they transfer energy, per unit of weight).

比较容易，也比较快速，所以电容器有着良好的功率密度（每单位重量的能量传递速率）。