One of the classics is the lemon battery. [iqless] decided to have a ... Instead, an electrolyte tray was 3D printed. The tray can be filled with lemon juice (either hand-squeezed or straight ...

In the technologically-underpinned modern world, most of us interact with a battery of ... and a 3D-printed case is used to help hold everything together, with a spring mechanism built-in which ...