/ID/218741/a-39thermal-battery39-for-villages-in-india/page/1/
Sunday, January 29th, 2012   
Startup Promethean Power had to ditch its dream of solar-powered milk chillers in rural India, but hit upon a novel energy storage system that's cheaper and overcomes the unreliable grid.
UKYahoo! News via Yahoo! News
2012-01-29 06:16:34
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