Make your own battery using copper coins, vinegar, foil and cardboard. I had enough energy to power an LED with mine and also a TV remote! Really simple scie...
附件
長度: 04:09, 發表時間 : 2021-11-21 22:34
觀看次數 : 390
Make your own battery using copper coins, vinegar, foil and cardboard. I had enough energy to power an LED with mine and also a TV remote! Really simple scie...