Million Mile Light captures energy from the runner’s motion
Credit: Million Mile Light/battery free/werd
Million Mile Light is a safety light for runners to make them visible to other road users at night. Because it captures energy from the user at each stride, it doesn’t need batteries. Ever.
Although, a million miles does sound a trifle ambitious ...
http://www.werd.com/33906/million-mile-light/
Manufacturer’s web site
https://batteryfree.com/ / powered by motion kinetic energy Million Mile Light 30-lumen LED safety light runner run running runners step stride flashes pulse of light keep you safe weighs 1.5 ounces never needs a battery /
