Ref: MUC195156 The LR03 is a zinc-manganese dioxide battery used potassium hydroxide and zinc chloride as electrolyte for better battery life. AAA Alkaline batteries standard-size dry cell batteries used in low-drain portable devices. LR03 alkaline battery with almost twice the capacity of R03 batteries.so visit our website and amazon and buy product for best quality. visit us for best deals : -