Designer Qian Jiang’s latest creation puts your portable batteries and muscle power to use with this hand-crank battery recharger. A small hand-crank folds out of the battery and helps transform a electrical current to produce energy. All it takes is five minutes of turning and it’ll generate up to 50% of power. Indicators on the device show exactly how much power is generated. Sounds like an alternative to working out or playing with a stress ball, and its a great way to recycle batteries.
