Could call your local council, they usually have an e-waste process. Call them to ask about a pillowed battery and if they accept it. If they don’t accept it, they might be able to advise how to dispose of it.
Anecdotally, I’ve heard Battery World accepts them, but again, I’d call ahead to confirm.
Catfish@aussie.zone 1 day ago
I took my phone to the repair shop in a lunch cooler bag and they dealt with it