Quantity   Component name
1 × tiny DC motor that can run off 1 Li-ion cell 3.7 V()
1 × cut-off disk
1 × Li-ion cell 5.5x12x45 mm 180 mAh http://giantpowerlipos.myshopify.com/products/blade-e-flite-msrx-mcx-mcx2-nano-qx-umx-upgrade-1s-3-7v-180mah-lipo-25c
1 × a switch The one that can reverse polarity was used
4 × 3d-printed parts The box, the plug, the Thiiiiiiiing
1 × USB connector Use ones for cables; needs to be shortened with Dremel