Batteries contain cadmium, mercury, copper, zinc, lead, manganese, nickel and lithium, which may create a hazard when disposed incorrectly. The most important non metallurgical use of manganese is in the form of manganese dioxide, which is used as a depolarizer in dry cell batteries. Estimation of manganese content in the disposed dry battery samples has been determined by oxidation with excess standard potassium dichromate solution followed by titration with standard hydrogen peroxide solution. The effect of several variables like time variation, dichromate concentration was studied. It is observed that different volumes of battery sample solution are found to be in 1:1 correspondence with concentration of potassium dichromate solution