Estream provides users with the convenience of bringing their own power plant even while being off the grid. It’s compact and can fit perfectly into any size backpack. The product generates electricity as water flow rotates the attached turbine. As a generator, it produces 2.5W – 5W of energy and will fully charge the built-in 6,400mAh battery in about 4.5 hours, which can charge up to three smartphones, GoPros or even tablet PCs. This rechargeable product will provide continuous charges to devices as long as users have access to running water.