If you are careless and forgetful !! Here is a modification to the Pebble Charger, which means you will have your pebble charger with you at all times, as long as you carry your house/car keys .. In addition to the 3D printed part you will need breadboarding wire which you can get at any Hardware shop/RadioShack or just search for hookup wire on Amazon. For complete instruction follow the instructable by zeq at http://www.instructables.com/id/Pebble-Charger/Once you have the hook up wire ( breadboarding wire) handy follow the instructable by zeq at http://www.instructables.com/id/Pebble-Charger/