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This comment: http://www.reddit.com/r/science/comments/i6pfi/new_alloy_can...

Which says that the efficiency could reach 30% with some work. I assume that %30 is not a typo.

Oh, I think 30% is the theoretical maximum. He says they can reach 3% with years of work. It would be great if they could achieve 30%, but I doubt it.

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