Due to their closed life cycle and multiple reusability, lead-acid batteries are sustainable. A used automobile battery is delivered to an authorised recycler, where all of its parts are recovered, recycled, and sold to battery producers. Certainly, the battery in the user's vehicle has been and will continue to be recycled indefinitely thanks to the cradle-to-cradle cycle. Note that if incorrectly disposed of, lead acid batteries could be dangerous to both human health and the environment.