But this means that we must definitively know whether our handheld wireless, battery-powered device has enough power to complete the transactions.

这也意味着我们要准确地知道，电池供电的无线手持设备是否有足够的电量来完成处理。

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Every battery-powered device could be affected, from cell phones to cameras to electric cars.

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It's the first stereo speaker to offer 360-degree sound in a battery-powered device, and features a 15-hour rechargeable battery.

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They can look like any other battery-powered electronic device.

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