TO GET THESE DISCOUNTED PRICES, YOUR CORE RETURN IS REQUIRED!
Used batteries contain parts that can be recycled. When batteries are sold, they include a core price that is used as a deposit on the portion of the parts in the battery that can be recycled. Returning your used battery saves you money when purchasing a new battery, because, the price of the new battery is reduced by the value of the core. This also ensures that your old batteries use environmentally friendly standards when disposed.