The electrification of Europe and America in the late 19th century sparked the use of storage batteries for telegraphy, portable electric-lighting systems and back-up power.

在19世纪晚期，欧洲和美国的电气化进程开始将蓄电池大规模用于电信技术、便携式电灯系统和后备电源。

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Their actual use may turn out to be to provide power for portable electronic devices.

但它的实际用途可能是为便携式电子设备提供能源。

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Scientists used two harmless viruses to create high-performance, rechargeable lithium-ion batteries that could power portable electronic devices like mobile phones or GPS systems for military uses.

由两种无害的病毒制造的高性能电池，可以为便携式电子设备如手机、GPS系统提供动力，此设备也可用于军事目的。

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What does the new gas-free motor technology mean for portable outdoor power equipment?

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Solid-oxide cells, Lilliputian's choice, were abandoned by most manufacturers for use in portable power because they operate at scorching temperatures (up to 2, 500 degrees Fahrenheit).

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DMFCs cheaper and more efficient, which will, in turn, make them even more attractive as power sources for portable devices.

ECONOMIST: Consumer fuel cells