Remember the Duracell 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 tell the different batteries apart by a so-called ANSI coding with letters or with a combination of letters and numbers. The most common battery types are the AA and AAA batteries. These differ in size, construction, rated voltage and capacity. Standard models are the AAA, AA, C, D and 9V block types in ascending order of size. In addition, there are 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.