Depends where you live and what stuff you have. In Switzerland I would call the local «Werkhof» and ask what to do. Probably just bring them and declare as ele

Depends where you live and what stuff you have. In Switzerland I would call the local «Werkhof» and ask what to do. Probably just bring them and declare as electronic waste. Perhaps try to discharge them first by putting them into electronics and turning on, but it depends what lithium batteries you have, and this might be even dangerous. Just do a general cleanup. This might need a lot of time, and if you are really afraid, do this outside when it's dry outside. Avoid to handle batteries which are inflated or show some damage.