Able to generate renewable energy to power three LEDs, the Fido Fashion Energy Generating Dog Leash is barking up the right tree. What’s so cool about this dog leash is that it uses the coil and recoil of the leash to generate energy. Equipped with three high-intensity LEDs, this Fido Fashion leash uses the energy to power the lights, which shine down and forward so you can always see where you’re going – a handy gadget to have while navigating the wilderness on your next camping trip or hike. The LEDs are estimated to run for about six hours on a fully charged battery. The leash also features a small generator that allows the motion of the dog to create its own power. Fido Fashion.