#HTE

There’s a battery-free Game Boy that runs solely on the power of sunlight and the speed of your button-mashing

Just not very well

Video  Engineers have overhauled the classic handheld 8-bit Game Boy to include solar panels on the front and an internal electromagnetic coil to generate electrical energy from button presses. Not so much batteries not included as batteries not needed.…

https://go.theregister.com/feed/www.theregister.com/2020/09/04/battery_free_gameboy/