This Game Boy-Like Handheld Uses No Batteries
This handheld Game Boy-like project was created by a team of developers consisting of Jasper de Winkel, Josiah Hester, Przemysław Pawełczak, and Vito Kortbeek. Unlike the original handheld sensation of the late '80s and early '90s, this device uses a 3D-printed case and requires no batteries to operate. We've modded Game Boys before, but this is next-level!
Well, technically it has a battery inside, but the battery isn't something you recharge with a cable or replace. By exposing the solar panel modules to the sun or mashing buttons, enough current will draw to power the device. The project is officially known as "Engage."