In theory, he says, such devices could maintain their power indefinitely until used, unlike batteries whose charges leak away gradually as they sit unused.

理论上，他说，这种设备应该能够无限期地保持它们的电量，直到它们被使用；不像电池，当它们未被使用时电荷也在渐渐泄漏。

youdao

Meanwhile, materials such as lithium (PDF) and cobalt used in the manufacture of batteries for rechargeable vehicles are largely sourced outside the United States.

与此同时，生产电瓶车车用蓄电池所使用的锂和钴等材料又大多从美国境外采购。

youdao

First tof all, if the vessels were used as batteries, they would probably have been attached to some electricity conductors such as metal wires.

首先，如果这些土罐以往被用作电池的话，它们就很可能连着一些类似于金属线的电导体。

youdao

A WHO official in Jerusalem says the agency believes Israel is reluctant to allow certain items, such as batteries and electronic equipment into Gaza because it considers those items could potentially be used for military purposes.

VOA: standard.2010.06.01

For sensors expected to last months or a year on batteries, though, such as those used in security applications like window openings and motion detection, Bluetooth Smart is developing into a competitor to other low-power radios.

ENGADGET: Switched On: The roads to home automation

To be sure, increasingly capacious chemistry and materials are used to improve the capabilities of batteries such as switching from carbon-based anodes to silicon-based ones.

FORBES: Tesla Debacle Highlights Need For New EV Battery Technology

Lithium batteries are also commonly used in other planes, but these are much smaller batteries, running much more minor things such as a small set of lights.

BBC: A model of the A350