Schema einer Zelle eines Bleiakkumulators
<a href="//commons.wikimedia.org/wiki/User:%D0%94.%D0%98%D0%BB%D1%8C%D0%B8%D0%BD" title="User:Д.Ильин">Д.Ильин</a>: vectorization, translation
<a href="//commons.wikimedia.org/wiki/File:Bleiakku.PNG" title="File:Bleiakku.PNG">File:Bleiakku.PNG</a> by <a href="//commons.wikimedia.org/wiki/User:Oguenther" title="User:Oguenther">Oguenther</a>