[media = http: //www.youtube.com/watch? v = ggMya2LcuvM]
The video shows a simple battery that is easy to make. do it yourself in home conditions. It is not difficult to make it and it will not take much time. You can make such a battery for the sake of experiment. As an electrode, two minus plates from the old UPS battery, which was broken, were taken. Put them in water, added electrolyte, charged and the result in the video.