Hiking has its share of highs and lows. One of the less pleasing aspects is ensuring you have an adequate source of energy to power your personal electronic equipment. There are a number of renewable energy options available that you may consider when planning your next hiking trip. You could harness the sun’s energy and use a solar-powered charger or solar-wrapped batteries. Perhaps you might choose to use wind power to keep you in touch with the world? But wouldn’t it be great if you could harness power using your own kinetic energy? It makes sense. You’re using your legs all day, surely all that sweat, pain and muscle fatigue is good for something? Enter the Etive – a concept device that uses kinetic energy as a power source for recharging all the electronic gadgets you bring to the great outdoors.