Remember the Energizer commercial with the drumming bunny? Batteries give power to such toys as well as various electronic devices. For example, you can't charge flashlights, scales, photo flashes and remote controls, so you need the right batteries. You can distinguish the different batteries by using a so-called ANSI coding with letters or a combination of letters and numbers. The most common types of batteries are AA and AAA batteries. These differ in size, design, nominal voltage and capacity. Standard models are the types AAA, AA, C, D and 9V block, ascending by size. There are also so-called button cells, which you need for example for wristwatches, hearing aids and calculators. Well-known brands that are available online are Varta, Duracell, Energizer, Annsmann and GP Batteries.