Every now and then a new product comes along that seems to obvious in retrospect that you’re surprised no-one had thought of it before.  I wrote earlier about the nifty BioLite electricity-generating stove that couples the gasification principle with the thermoelectric effect (real space probe technology!)

The Estream is another great example. Estream is a portable hydroelectric generator that fits in your backpack. Simply dunk the mini-turbine into a fast flowing stream or river, and the device will convert the energy of the moving water into electricity to charge-up on the internal battery. This stored energy can then be used to charge any USB devices, or even power the integrated light as a hangable lamp.

Perfect for taking on camping trips, or making a big difference to off-grid living and providing for yourself if civilisation ever did collapse!

Also check out The Knowledge posts on How to convert a washing machine motor into a generator, How to convert a ceiling fan into a wind turbine, and How To make your own wind turbine.

You can support Estream on Kickstarter here.

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