Solepower is a technology that generates electricity from walking. It works by capturing the mechanical energy from footsteps using coils in the sole, converting it to electrical energy via a generator, and storing it in a battery. The battery can then charge mobile devices directly or via a power pack. Solepower insoles are slim and can fully charge a phone after 2-3 kilometers of walking. They provide a portable renewable energy source that is safe and waterproof. The technology has applications for powering devices in remote areas without electricity.