There are many uses for homemade batteries cells. They are great for Emergency home lighting, as well as running small motors etc.. In many countries electricity can only be used for a few hours a day. which effects many people around the world who live in these areas, there economys just can not afford to run there power plants for long periods at a time. Many of these people have to use candles and oil lamps just to be able to eat or to read a book.