Old batteries do not belong in the residual waste. You can return used batteries to us free of charge. As an end user, you are legally obliged to return used batteries.
Batteries containing harmful substances are marked with a symbol consisting of a crossed-out dustbin, as shown below, and the chemical symbol of the metals
(Hg, Cd, Pb). "Cd" stands for cadmium. "Hg" stands for mercury. "Pb" stands for lead.