Finally, a fully enclosed battery pack provides between 16.5 and 22 watt-hours of operation (depending upon cell technology).

最后，全封闭的电池组可提供16.5到22瓦小时的连续操作(取决于电池技术)。

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By ensconcing the lithium inside the membrane's seal, the PolyPlus battery reacts safely with the oxygen dissolved in the water and delivers as much as 1,300 watt-hours per kilogram of electricity.

通过将锂安置在密封薄膜中，PolyPlus电池能够与水中的溶氧安全地发生反应，并能输送高达每公斤1,30 0瓦特时的电力。

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By ensconcing the lithium inside the membrane's seal, the PolyPlus battery reacts safely with the oxygen dissolved in the water and delivers as much as 1, 300 watt-hours per kilogram of electricity.

通过将锂安置在密封薄膜中，PolyPlus电池能够与水中的溶氧安全地发生反应，并能输送高达每公斤1 30 0瓦特时的电力。

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The world is using less oil today to generate electric power than it did in 1973, despite output almost trebling to 17.5 billion watt hours of electricity, from 6.1 billion WH.

FORBES: Magazine Article

The result is a material that has an energy density of about 0.005 watt-hours per kilogram.

ECONOMIST: Carbon-composite batteries

And by covering the fibres with carbon nanotubes, at least 20 watt-hours per kilogram is expected by the end of next year.

ECONOMIST: Carbon-composite batteries