A smartphone refers to a cellphone that combines the functions of a regular cellphone with features of a computer.
Smartphones thus not only allow phone conversations and text messaging. They can also be used to take pictures and videos, to surf the web and play music and videos - to name just a few examples. Modern smartphones can be operated by touching the phone's screen.
Cobalt is one of the most important raw materials used to make batteries for smartphones, tablets and e-cars. About two thirds of cobalt comes from the Democratic Republic of Congo. In addition to the big industrial mines, there are many small makeshift mines where even children source the raw material, risking their lives. Linda Staude went to explore.