Newly designed Australian army vests will be equipped with paper-thin, flexible and lightweight solar-cells with very high power-to-weight ratios.

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Johanson of Solar Electric Vehicles said he'd like to see Toyota bring the weight of a Prius down from 3, 000 pounds to 2, 000.

CNN: Solar cars still a way off

Technologies on display ranged from solar powered water purification units to military vehicles using next generation materials and energy sources to light weight batteries that can give better range and endurance.

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