Regulations will depend on your country of residence. However you shouldn’t usually place with the rest of the trash. Most countries have a system in place to recycle elements in batteries. This collection system is usually done by special designed bins for batteries. Please contact your local authorities for the locations of these bins, they can often be found at the local communal disposal system or large retail outlets selling batteries. The batteries can therefore be separately collected and tracked as their elements are recycled or disposed of safely.