This Little Gadget Fits Comfortably In A Backpack, But It Can Power Three Of Your Devices With Clean Energy

A win-win.

That little device you see above? It could be the small answer to some of life's big energy inconveniences. For example, how much charge do you have on your phone right now? Is your tablet getting a little low on juice? 

The Estream — called on its Kickstarter page a "portable water power generator" that fits into backpack — can be dropped into a flowing river, and a mere four and a half hours later, can charge up your devices. What's more, it can also serve as a light source ... all run by the power of water.

The revolutionary device lets you "bring your own power plant" into the wild, and "converts any type of moving water into stored energy to charge every USB-connected mobile" device.

Hmmm ... kind of makes us wonder what a bigger version could do and the positive effects it could have on our environment.

Check out the video above to see more!