What is Black Mass? Black Mass is the first step in the battery recycling process and is based on the mechanical treatment of the batteries. After the battery has reached the end of its life, it can be dismantled and the components can be recycled. The “Black Mass” is a mixture of different Cathode and Anode materials, including Lithium, Cobalt, Nickel, and Manganese. The term “Black Mass” is used because the mixture is typically dark in color.