Design unique and novel mechanical power generation twisted battery The rechargeable battery requires a charger to store energy. Without a charger, the rechargeable battery is basically a waste. And this design allows the battery itself to be powered, no need for a charger, which is obviously a lot easier. Recharging the battery can be done by twisting the battery to convert the mechanical energy into electrical energy without the need for a charger or a new battery. Automatic Batch Pre-expander Machine Automatic Batch Pre-Expander Machine,Polystyrene Eps Foam Machine,High Precision Styrofoam Machine,Eps Batch Foam Machine Zhejiang Huasheng Machinery Equipment Co.,Ltd , https://www.huashengepsmachine.com