>>949043Seriously?
There's a series of zinc and copper terminals, which stacks the amperage in the same way that individual cells would. The heat being generated is just a matter of the electricity being forced through a higher resistance material, such as a nichrome wire, though this particular one looks like it just arcs the electricity.
Unless you mean "how does an acid battery work?" in which case you're not smart enough to understand any answer I could give you.
