Fitbit charger

thingiverse

If you've misplaced your Fitbit USB charger, you can now print this case to recharge your device on the go. Once printed, inspect the side with 2 holes - the right hole is for + and the left one is for -. Cut two copper or conductive metal rectangles, each measuring 2x4mm in size, with a thickness of less than 1mm. Solder one end of each rectangle to a wire, then insert them into the case with the other ends pointing towards the top for optimal contact.