Re-chargeable batteries are no good when they run out of power and you have no electric point handy to tank them up again.
Designer Qian Jiang has come up with a cool and innovative concept for batteries. Wind Up Battery concept that will recharge its batteries through the standard power outlet or via its hand crank whenever there is no power supply available in the vicinity. It’s quite simple when your batteries are flat, wind them up and you’re gadgets are good to go agin. It claims that it could be fully charged in 20 minutes but Since this battery is still a concept, we’re a bit skeptical about it.


Via