About this 3D model
You can make a kinetic charger using your 3D printer and a little effort. This allows you to charge your electronic gadgets here and now. Also it would be a good gift for your favorite. How it works: http://www.slideshare.net/bulgakovatanya/elveet-kinetic-electric-power-charger https://youtu.be/LHIOgC25BWc Some details. Inductor: 25x5x2.5mm NdFeb Magnet 20 pieces https://www.indigo.com/magnets/rare_earth/blocks/neodymium-slab-magnet-25x5x2.5mm.html 2 pieces Li-ion battery (any up to 3500mA) https://goo.gl/QbeFSE 8 coils AWG28 (0.32mm) 2 springs for moving blocks 2 springs for battery I used Form Futura filament for printing the housing. http://www.formfutura.com/175mm-hdglass-blinded-pearl-blue.html But you can use ABS or PLA with a good result.