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Now and again i get invited to various lectures at the local uni, and i went to one about a year ago, all about renewable energy. Most was a bit over my head, but the lecturer was into hybrids and battery power, and he said that some major breakthro's were coming in the battery world. he said, that the next BIG thing on the horizon, that was being developed beyond its normal means, was the 'air battery'. He gave comparisons for power to weight ratio, efficiency and longevity, and showed via 3d models how it worked, but i've forgotten now. it looked very promissing, but he said it would be a few years before anything was seen in public.
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