Estream is a portable water-power generator that converts any type of moving water, such as that from a river or stream, into stored energy to charge most of today's usb-connected mobile devices, even while you are off the grid.
Link to the project: https://goo.gl/eQiXKd
Videos of Best inventions
KAISR Original - The Ultimate Inflatable Air Lounge
More inventions on crowdfunding channel :
Video used with permission. Video Copyright (c) of its respective owner.