Duracell Batteries are best suited when you need reliable, long lasting life from your everyday devices like: Toys, portable tape and CD players, clocks and radios, remote controls, electronic games, smoke alarms, PDAs, and flashlights. Alkaline batteries are an efficient battery type that is both economical and reliable. In alkaline batteries, the hydrous alkaline solution is used as an electrolyte. The most common use of this solution is in a manganese-dioxide primary cell with potassium hydroxide as an electrolyte. During cell discharge, the oxygen-rich manganese dioxide is reduced and the zinc becomes oxidized while ions are being transported through the conductive alkaline electrolyte.