Re-chargeable batteries are no good when they run out of power and you have no electric point handy to tank them up again. Here’s where the concept of the Wind Up Battery steps in; re-charge these cells via the conventional battery charger OR use the hand-crank to wind up and source-up some juice. Kinda like your hand-crank radios. A simply superb concept!



Designer: Qian Jiang

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