TOP 8 unusual gadgets for hiking

Compact hydro turbines and wind turbines

The producers went their separate ways. Some companies have relied on a variety of sails.
Others use a miniature turbine. It is driven by a fan-like structure.
Still others made a smaller analogue of a three-blade wind turbine and equipped their 50-watt device (weighing 650 grams) with a built-in 7500 mAh battery.