Unlike bulky solar panels that aren't much use at night or on foggy / rainy days, this cool new Waterlily USB can help you recharge your digital devices on the go from flowing water, strong winds, or even by hand with the optional hand crank accessory. This handy and quite portable 3-in-1 power generator can work day and night to recharge devices while camping, hiking, backpacking, hunting, surviving the apocalypse, and more. Just place the turbine in flowing water to generate as much power in 24 hours as a 60W solar panels. The faster the flow, the faster it generates power and that goes for hanging it in strong wind as well. A great alternative energy-generating source for any outdoor adventure.