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Safe treatments of spent car battery must be conducted because of its Lead (Pb) content that can be a toxic pollutant especially if it gets to drinking water supplies. The objectives of this study is to determine the effects of adsorbent types (zeolite and activated carbon) and concentrations (0%, 5%, 10%, 20%, and 25%) in reducing the Pb-content in waste water from spent car batteries recycling process. Imitated waste water samples was prepared by soaking the contents of a used car battery, such as plates and acid, in four liters of water for ten days, which resulted in an initial Pb-content of 8.02 mg/L and pH of 2. Adsorbents were prepared chemically and physically, and were then added to 100 ml leachate samples followed by stirring at 150 rpm for one hour. The volume of 0.5 M NaOH needed to neutralize the pH was 35.7 ml for 10 ml of waste sample. The lowest final concentration of Pb-content in spent car battery at 0.239 mg/L was achieved by adsorption using 25% activated carbon.