Focus Electric, Fusion Energi plug-in hybrid and C-MAX Energi plug-in hybrid all have an LED charge port that displays a circle of light directly related to battery life.

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"It's going to have a light that you can see from tens of miles away, " said Port Authority Vice Chairman Scott Rechler.

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They taught the rats to choose the active light source by poking their noses into a port to receive a sip of water as a reward.

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More than just supplying a battery-free source of light, though, the lantern can function as a charger, thanks to a USB port built into the casing.

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The investigation delayed eight incoming flights and 19 outbound ones by an average of 50 minutes, a Port Authority spokeswoman said, before authorities determined the bag contained only pieces of a light fixture.

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The Yemeni event had shone light on a serious threat that hit the front pages and quickly drew the attention of nearly every government and port authority in the world, especially in the United States.

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Just a week earlier the government reversed its position on pipeline ownership, giving him and his peers a provisional green light to build a 2m-barrel-a-day link from the oilfields of Western Siberia to the northern port of Murmansk.

ECONOMIST: Russian energy