Classroom Questions Questions for ‘What powers these electronics? We do!’ Batteries not required. This foldable keyboard (shown with its inventor Nelson Sepúlveda) can harvest energy from keystrokes. G.L. Kohuth/MSU Share this:FacebookTwitterRedditGoogle ClassroomEmailPrint By Science News for Students August 30, 2018 at 5:30 am Classroom questions are available for free with registration. Learn more Register to access: Client key* E-mail* Log in Already Registered? Enter your e-mail address above.