Twitter Facebook Email More VIDEO: Tech Gadget Charges Smartphones with Human Energy By Jackie Kostek | May 8, 2014 7:00am | Updated on May 9, 2014 11:12am@JackieKostek Get the Chicago newsletter delivered right to your inbox! Sign Me Up!Email*SubscribeBy clicking subscribe, I agree to be bound by the Terms of Use and Privacy PolicyThank you for signing up!