Power from squeezing water

New Scientist:

"An entirely new way of generating electricity has been discovered. The way it works is simple: squeeze water through fine pipelines and an electrical current flows.

"...To test the idea, Kostiuk and his team pumped ordinary tap water through a block of glass riddled with half a million holes, each just a hundredth of a millimetre wide. When an electrode was attached to each end they measured a current of a few microamps.

"To increase the current, they will need to increase the efficiency of the device. At the moment, says Kostiuk, 'it's really pretty pathetic - a fraction of a percent.'"

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