Swing Your Energy – Mobile Battery Charger: "

Finally a smart little design that makes your life easier, The Swing Your Energy Charger by Song Teaho & Hyejin Lee allows you to insert your battery into the device, then give it a few good spins around your index finger and done you have enough power to chat for little longer or at least get you to a charger. Source

Chargless power would gave me forever energy to miss you, happy